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1200102121 = 1279449623
BaseRepresentation
bin100011110001000…
…0001101011101001
310002122012111121201
41013202001223221
54424211231441
6315030204201
741511462001
oct10742015351
93078174551
101200102121
11566476539
12295ab3661
1316182baca
14b5559001
157055ac31
hex47881ae9

1200102121 has 4 divisors (see below), whose sum is σ = 1209551872. Its totient is φ = 1190652372.

The previous prime is 1200102109. The next prime is 1200102203. The reversal of 1200102121 is 1212010021.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 1200102121 - 211 = 1200100073 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1200102098 and 1200102107.

It is not an unprimeable number, because it can be changed into a prime (1200102221) 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, 4724685 + ... + 4724938.

It is an arithmetic number, because the mean of its divisors is an integer number (302387968).

Almost surely, 21200102121 is an apocalyptic number.

It is an amenable number.

1200102121 is a deficient number, since it is larger than the sum of its proper divisors (9449751).

1200102121 is an equidigital number, since it uses as much as digits as its factorization.

1200102121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9449750.

The product of its (nonzero) digits is 8, while the sum is 10.

The square root of 1200102121 is about 34642.4901096904. The cubic root of 1200102121 is about 1062.6887127041.

Adding to 1200102121 its reverse (1212010021), we get a palindrome (2412112142).

The spelling of 1200102121 in words is "one billion, two hundred million, one hundred two thousand, one hundred twenty-one".

Divisors: 1 127 9449623 1200102121