121525052541 has 4 divisors (see below), whose sum is σ = 162033403392. Its totient is φ = 81016701692.

The previous prime is 121525052533. The next prime is 121525052569. The reversal of 121525052541 is 145250525121.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 121525052541 - 2³ = 121525052533 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121525052591) 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, 20254175421 + ... + 20254175426.

It is an arithmetic number, because the mean of its divisors is an integer number (40508350848).

Almost surely, 2^121525052541 is an apocalyptic number.

It is an amenable number.

121525052541 is a deficient number, since it is larger than the sum of its proper divisors (40508350851).

121525052541 is an equidigital number, since it uses as much as digits as its factorization.

121525052541 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40508350850.

The product of its (nonzero) digits is 20000, while the sum is 33.

Adding to 121525052541 its reverse (145250525121), we get a palindrome (266775577662).

The spelling of 121525052541 in words is "one hundred twenty-one billion, five hundred twenty-five million, fifty-two thousand, five hundred forty-one".