121755432444725 has 12 divisors (see below), whose sum is σ = 150977299321380. Its totient is φ = 97403982672000.

The previous prime is 121755432444703. The next prime is 121755432444731. The reversal of 121755432444725 is 527444234557121.

It can be written as a sum of positive squares in 6 ways, for example, as 9027969696964 + 112727462747761 = 3004658^2 + 10617319^2 .

It is a de Polignac number, because none of the positive numbers 2^k-121755432444725 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2140970 + ... + 15751019.

It is an arithmetic number, because the mean of its divisors is an integer number (12581441610115).

Almost surely, 2^{121755432444725} is an apocalyptic number.

It is an amenable number.

121755432444725 is a deficient number, since it is larger than the sum of its proper divisors (29221866876655).

121755432444725 is a wasteful number, since it uses less digits than its factorization.

121755432444725 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18164200 (or 18164195 counting only the distinct ones).

The product of its digits is 37632000, while the sum is 56.

The spelling of 121755432444725 in words is "one hundred twenty-one trillion, seven hundred fifty-five billion, four hundred thirty-two million, four hundred forty-four thousand, seven hundred twenty-five".