121752273431 has 4 divisors (see below), whose sum is σ = 121876132272. Its totient is φ = 121628414592.

The previous prime is 121752273413. The next prime is 121752273443. The reversal of 121752273431 is 134372257121.

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

It is a cyclic number.

It is not a de Polignac number, because 121752273431 - 2¹⁸ = 121752011287 is a prime.

It is a super-2 number, since 2×121752273431² (a number of 23 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 (121752273451) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 61927946 + ... + 61929911.

It is an arithmetic number, because the mean of its divisors is an integer number (30469033068).

Almost surely, 2^121752273431 is an apocalyptic number.

121752273431 is a deficient number, since it is larger than the sum of its proper divisors (123858841).

121752273431 is an equidigital number, since it uses as much as digits as its factorization.

121752273431 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 123858840.

The product of its digits is 70560, while the sum is 38.

The spelling of 121752273431 in words is "one hundred twenty-one billion, seven hundred fifty-two million, two hundred seventy-three thousand, four hundred thirty-one".