121744515365431 has 16 divisors (see below), whose sum is σ = 150192419904000. Its totient is φ = 96373469431008.

The previous prime is 121744515365411. The next prime is 121744515365441. The reversal of 121744515365431 is 134563515447121.

It is not a de Polignac number, because 121744515365431 - 2⁵ = 121744515365399 is a prime.

It is a super-2 number, since 2×121744515365431² (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 (121744515365411) 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, 13037531781 + ... + 13037541118.

It is an arithmetic number, because the mean of its divisors is an integer number (9387026244000).

Almost surely, 2^{121744515365431} is an apocalyptic number.

121744515365431 is a deficient number, since it is larger than the sum of its proper divisors (28447904538569).

121744515365431 is a wasteful number, since it uses less digits than its factorization.

121744515365431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26075072958.

The product of its digits is 6048000, while the sum is 52.

The spelling of 121744515365431 in words is "one hundred twenty-one trillion, seven hundred forty-four billion, five hundred fifteen million, three hundred sixty-five thousand, four hundred thirty-one".