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20122121011 = 57829347959
BaseRepresentation
bin10010101111010111…
…110011001100110011
31220221100022122210011
4102233113303030303
5312202230333021
613124410515351
71311434130556
oct225727631463
956840278704
1020122121011
11859645a383
123a96a35b57
131b88a950a5
14d8c5d469d
157cb83ede1
hex4af5f3333

20122121011 has 4 divisors (see below), whose sum is σ = 20122526800. Its totient is φ = 20121715224.

The previous prime is 20122121003. The next prime is 20122121017. The reversal of 20122121011 is 11012122102.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 11012122102 = 25506061051.

It is a cyclic number.

It is not a de Polignac number, because 20122121011 - 23 = 20122121003 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20122120982 and 20122121000.

It is not an unprimeable number, because it can be changed into a prime (20122121017) 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, 116151 + ... + 231808.

It is an arithmetic number, because the mean of its divisors is an integer number (5030631700).

Almost surely, 220122121011 is an apocalyptic number.

20122121011 is a deficient number, since it is larger than the sum of its proper divisors (405789).

20122121011 is an equidigital number, since it uses as much as digits as its factorization.

20122121011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 405788.

The product of its (nonzero) digits is 16, while the sum is 13.

Adding to 20122121011 its reverse (11012122102), we get a palindrome (31134243113).

The spelling of 20122121011 in words is "twenty billion, one hundred twenty-two million, one hundred twenty-one thousand, eleven".

Divisors: 1 57829 347959 20122121011