100121310525 has 24 divisors (see below), whose sum is σ = 165564036160. Its totient is φ = 53388311040.

The previous prime is 100121310491. The next prime is 100121310551. The reversal of 100121310525 is 525013121001.

It is not a de Polignac number, because 100121310525 - 2⁸ = 100121310269 is a prime.

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, 303021 + ... + 540429.

Almost surely, 2^100121310525 is an apocalyptic number.

100121310525 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

100121310525 is a deficient number, since it is larger than the sum of its proper divisors (65442725635).

100121310525 is a wasteful number, since it uses less digits than its factorization.

100121310525 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 243045 (or 243040 counting only the distinct ones).

The product of its (nonzero) digits is 300, while the sum is 21.

Adding to 100121310525 its reverse (525013121001), we get a palindrome (625134431526).

The spelling of 100121310525 in words is "one hundred billion, one hundred twenty-one million, three hundred ten thousand, five hundred twenty-five".