121013031431 has 2 divisors, whose sum is σ = 121013031432. Its totient is φ = 121013031430.

The previous prime is 121013031409. The next prime is 121013031493. The reversal of 121013031431 is 134130310121.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 121013031431 - 2⁶ = 121013031367 is a prime.

It is a super-2 number, since 2×121013031431² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (121019031431) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60506515715 + 60506515716.

It is an arithmetic number, because the mean of its divisors is an integer number (60506515716).

Almost surely, 2^121013031431 is an apocalyptic number.

121013031431 is a deficient number, since it is larger than the sum of its proper divisors (1).

121013031431 is an equidigital number, since it uses as much as digits as its factorization.

121013031431 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 216, while the sum is 20.

Adding to 121013031431 its reverse (134130310121), we get a palindrome (255143341552).

The spelling of 121013031431 in words is "one hundred twenty-one billion, thirteen million, thirty-one thousand, four hundred thirty-one".