131121025 has 48 divisors (see below), whose sum is σ = 192630528. Its totient is φ = 86688000.

The previous prime is 131120989. The next prime is 131121031. The reversal of 131121025 is 520121131.

It is not a de Polignac number, because 131121025 - 2²³ = 122732417 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 757839 + ... + 758011.

It is an arithmetic number, because the mean of its divisors is an integer number (4013136).

Almost surely, 2^131121025 is an apocalyptic number.

It is an amenable number.

131121025 is a deficient number, since it is larger than the sum of its proper divisors (61509503).

131121025 is a wasteful number, since it uses less digits than its factorization.

131121025 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 322 (or 317 counting only the distinct ones).

The product of its (nonzero) digits is 60, while the sum is 16.

The square root of 131121025 is about 11450.8089233905. The cubic root of 131121025 is about 508.0316607151.

Adding to 131121025 its reverse (520121131), we get a palindrome (651242156).

The spelling of 131121025 in words is "one hundred thirty-one million, one hundred twenty-one thousand, twenty-five".