121752105531 has 32 divisors (see below), whose sum is σ = 190503505920. Its totient is φ = 67729349664.

The previous prime is 121752105521. The next prime is 121752105661. The reversal of 121752105531 is 135501257121.

It is not a de Polignac number, because 121752105531 - 2¹⁷ = 121751974459 is a prime.

It is a super-2 number, since 2×121752105531² (a number of 23 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 121752105492 and 121752105501.

It is not an unprimeable number, because it can be changed into a prime (121752105521) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 349405 + ... + 604638.

It is an arithmetic number, because the mean of its divisors is an integer number (5953234560).

Almost surely, 2^121752105531 is an apocalyptic number.

121752105531 is a deficient number, since it is larger than the sum of its proper divisors (68751400389).

121752105531 is a wasteful number, since it uses less digits than its factorization.

121752105531 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 954215.

The product of its (nonzero) digits is 10500, while the sum is 33.

The spelling of 121752105531 in words is "one hundred twenty-one billion, seven hundred fifty-two million, one hundred five thousand, five hundred thirty-one".