131000121 has 24 divisors (see below), whose sum is σ = 216592064. Its totient is φ = 74740320.

The previous prime is 131000087. The next prime is 131000161. The reversal of 131000121 is 121000131.

It is not a de Polignac number, because 131000121 - 2⁶ = 131000057 is a prime.

It is a super-2 number, since 2×131000121² = 34322063404029282, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (9).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (131000161) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 54066 + ... + 56436.

Almost surely, 2^131000121 is an apocalyptic number.

It is an amenable number.

131000121 is a deficient number, since it is larger than the sum of its proper divisors (85591943).

131000121 is a wasteful number, since it uses less digits than its factorization.

131000121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3261 (or 3258 counting only the distinct ones).

The product of its (nonzero) digits is 6, while the sum is 9.

The square root of 131000121 is about 11445.5284281679. The cubic root of 131000121 is about 507.8754641820.

Adding to 131000121 its reverse (121000131), we get a palindrome (252000252).

The spelling of 131000121 in words is "one hundred thirty-one million, one hundred twenty-one", and thus it is an aban number.