121312051 has 32 divisors (see below), whose sum is σ = 154828800. Its totient is φ = 92606976.

The previous prime is 121312049. The next prime is 121312069. The reversal of 121312051 is 150213121.

It is not a de Polignac number, because 121312051 - 2¹ = 121312049 is a prime.

It is a super-2 number, since 2×121312051² = 29433227435653202, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (121312001) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 347425 + ... + 347773.

It is an arithmetic number, because the mean of its divisors is an integer number (4838400).

Almost surely, 2^121312051 is an apocalyptic number.

121312051 is a deficient number, since it is larger than the sum of its proper divisors (33516749).

121312051 is a wasteful number, since it uses less digits than its factorization.

121312051 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 523.

The product of its (nonzero) digits is 60, while the sum is 16.

The square root of 121312051 is about 11014.1750031494. The cubic root of 121312051 is about 495.0335670874.

Adding to 121312051 its reverse (150213121), we get a palindrome (271525172).

The spelling of 121312051 in words is "one hundred twenty-one million, three hundred twelve thousand, fifty-one".