31425512611121 has 2 divisors, whose sum is σ = 31425512611122. Its totient is φ = 31425512611120.

The previous prime is 31425512611117. The next prime is 31425512611151. The reversal of 31425512611121 is 12111621552413.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 31354456245025 + 71056366096 = 5599505^2 + 266564^2 .

It is a cyclic number.

It is not a de Polignac number, because 31425512611121 - 2² = 31425512611117 is a prime.

It is a super-2 number, since 2×31425512611121² (a number of 28 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (31425512611151) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15712756305560 + 15712756305561.

It is an arithmetic number, because the mean of its divisors is an integer number (15712756305561).

Almost surely, 2^{31425512611121} is an apocalyptic number.

It is an amenable number.

31425512611121 is a deficient number, since it is larger than the sum of its proper divisors (1).

31425512611121 is an equidigital number, since it uses as much as digits as its factorization.

31425512611121 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 14400, while the sum is 35.

The spelling of 31425512611121 in words is "thirty-one trillion, four hundred twenty-five billion, five hundred twelve million, six hundred eleven thousand, one hundred twenty-one".