121115402525 has 24 divisors (see below), whose sum is σ = 164149639584. Its totient is φ = 88104139200.

The previous prime is 121115402483. The next prime is 121115402533. The reversal of 121115402525 is 525204511121.

It is not a de Polignac number, because 121115402525 - 2²⁴ = 121098625309 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2759291 + ... + 2802840.

It is an arithmetic number, because the mean of its divisors is an integer number (6839568316).

Almost surely, 2^121115402525 is an apocalyptic number.

It is an amenable number.

121115402525 is a deficient number, since it is larger than the sum of its proper divisors (43034237059).

121115402525 is a wasteful number, since it uses less digits than its factorization.

121115402525 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5562221 (or 5562216 counting only the distinct ones).

The product of its (nonzero) digits is 4000, while the sum is 29.

Adding to 121115402525 its reverse (525204511121), we get a palindrome (646319913646).

The spelling of 121115402525 in words is "one hundred twenty-one billion, one hundred fifteen million, four hundred two thousand, five hundred twenty-five".