121331253111431 has 4 divisors (see below), whose sum is σ = 132361367030664. Its totient is φ = 110301139192200.

The previous prime is 121331253111427. The next prime is 121331253111449. The reversal of 121331253111431 is 134111352133121.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 121331253111431 - 2² = 121331253111427 is a prime.

It is a super-2 number, since 2×121331253111431² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121331253111401) 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, 5515056959600 + ... + 5515056959621.

It is an arithmetic number, because the mean of its divisors is an integer number (33090341757666).

Almost surely, 2^{121331253111431} is an apocalyptic number.

121331253111431 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

121331253111431 is a deficient number, since it is larger than the sum of its proper divisors (11030113919233).

121331253111431 is a wasteful number, since it uses less digits than its factorization.

121331253111431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11030113919232.

The product of its digits is 6480, while the sum is 32.

The spelling of 121331253111431 in words is "one hundred twenty-one trillion, three hundred thirty-one billion, two hundred fifty-three million, one hundred eleven thousand, four hundred thirty-one".