130121231 has 4 divisors (see below), whose sum is σ = 134608200. Its totient is φ = 125634264.

The previous prime is 130121227. The next prime is 130121287. The reversal of 130121231 is 132121031.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 132121031 = 7 ⋅18874433.

It is not a de Polignac number, because 130121231 - 2² = 130121227 is a prime.

It is a super-2 number, since 2×130121231² = 33863069513910722, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (130121531) 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, 2243441 + ... + 2243498.

It is an arithmetic number, because the mean of its divisors is an integer number (33652050).

Almost surely, 2^130121231 is an apocalyptic number.

130121231 is a deficient number, since it is larger than the sum of its proper divisors (4486969).

130121231 is an equidigital number, since it uses as much as digits as its factorization.

130121231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4486968.

The product of its (nonzero) digits is 36, while the sum is 14.

The square root of 130121231 is about 11407.0693431749. The cubic root of 130121231 is about 506.7371226371.

Adding to 130121231 its reverse (132121031), we get a palindrome (262242262).

The spelling of 130121231 in words is "one hundred thirty million, one hundred twenty-one thousand, two hundred thirty-one".