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BaseRepresentation
bin1010111010100111101101…
…1110000101111000101101
31120111101210122210101011012
42232221323132011320231
53033121011242023041
641305423400235005
72346062645442614
oct256517336057055
946441718711135
1012002210111021
11390812178aa39
12141a137a6ba65
13690a5a5514a0
142d6ca532c87b
1515c311e883eb
hexaea7b785e2d

12002210111021 has 4 divisors (see below), whose sum is σ = 12925457042652. Its totient is φ = 11078963179392.

The previous prime is 12002210111011. The next prime is 12002210111077. The reversal of 12002210111021 is 12011101220021.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 6495744255625 + 5506465855396 = 2548675^2 + 2346586^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2k-12002210111021 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 12002210110987 and 12002210111005.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12002210111011) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 461623465796 + ... + 461623465821.

It is an arithmetic number, because the mean of its divisors is an integer number (3231364260663).

Almost surely, 212002210111021 is an apocalyptic number.

It is an amenable number.

12002210111021 is a deficient number, since it is larger than the sum of its proper divisors (923246931631).

12002210111021 is an equidigital number, since it uses as much as digits as its factorization.

12002210111021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 923246931630.

The product of its (nonzero) digits is 16, while the sum is 14.

Adding to 12002210111021 its reverse (12011101220021), we get a palindrome (24013311331042).

The spelling of 12002210111021 in words is "twelve trillion, two billion, two hundred ten million, one hundred eleven thousand, twenty-one".

Divisors: 1 13 923246931617 12002210111021