121752055631 has 4 divisors (see below), whose sum is σ = 121787524272. Its totient is φ = 121716586992.

The previous prime is 121752055603. The next prime is 121752055661. The reversal of 121752055631 is 136550257121.

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 121752055631 - 2⁶ = 121752055567 is a prime.

It is a super-2 number, since 2×121752055631² (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 (121752055661) 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, 17729171 + ... + 17736036.

It is an arithmetic number, because the mean of its divisors is an integer number (30446881068).

Almost surely, 2^121752055631 is an apocalyptic number.

121752055631 is a deficient number, since it is larger than the sum of its proper divisors (35468641).

121752055631 is an equidigital number, since it uses as much as digits as its factorization.

121752055631 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35468640.

The product of its (nonzero) digits is 63000, while the sum is 38.

The spelling of 121752055631 in words is "one hundred twenty-one billion, seven hundred fifty-two million, fifty-five thousand, six hundred thirty-one".