121752373431 has 32 divisors (see below), whose sum is σ = 177340810752. Its totient is φ = 73846523520.

The previous prime is 121752373417. The next prime is 121752373433. The reversal of 121752373431 is 134373257121.

It is not a de Polignac number, because 121752373431 - 2⁵ = 121752373399 is a prime.

It is a super-2 number, since 2×121752373431² (a number of 23 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is a self number, because there is not a number n which added to its sum of digits gives 121752373431.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121752373433) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 14984536 + ... + 14992658.

It is an arithmetic number, because the mean of its divisors is an integer number (5541900336).

Almost surely, 2^121752373431 is an apocalyptic number.

121752373431 is a deficient number, since it is larger than the sum of its proper divisors (55588437321).

121752373431 is a wasteful number, since it uses less digits than its factorization.

121752373431 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13623.

The product of its digits is 105840, while the sum is 39.

The spelling of 121752373431 in words is "one hundred twenty-one billion, seven hundred fifty-two million, three hundred seventy-three thousand, four hundred thirty-one".