121432311431 has 16 divisors (see below), whose sum is σ = 132097516416. Its totient is φ = 111160659456.

The previous prime is 121432311421. The next prime is 121432311439. The reversal of 121432311431 is 134113234121.

It is a cyclic number.

It is not a de Polignac number, because 121432311431 - 2¹⁸ = 121432049287 is a prime.

It is a super-2 number, since 2×121432311431² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 121432311431.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121432311439) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1808105 + ... + 1874061.

It is an arithmetic number, because the mean of its divisors is an integer number (8256094776).

Almost surely, 2^121432311431 is an apocalyptic number.

121432311431 is a deficient number, since it is larger than the sum of its proper divisors (10665204985).

121432311431 is a wasteful number, since it uses less digits than its factorization.

121432311431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 68938.

The product of its digits is 1728, while the sum is 26.

Adding to 121432311431 its reverse (134113234121), we get a palindrome (255545545552).

The spelling of 121432311431 in words is "one hundred twenty-one billion, four hundred thirty-two million, three hundred eleven thousand, four hundred thirty-one".