233130121131 has 4 divisors (see below), whose sum is σ = 310840161512. Its totient is φ = 155420080752.

The previous prime is 233130121123. The next prime is 233130121157. The reversal of 233130121131 is 131121031332.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 233130121131 - 2³ = 233130121123 is a prime.

It is a super-2 number, since 2×233130121131² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 233130121098 and 233130121107.

It is not an unprimeable number, because it can be changed into a prime (233130121331) 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, 38855020186 + ... + 38855020191.

It is an arithmetic number, because the mean of its divisors is an integer number (77710040378).

Almost surely, 2^233130121131 is an apocalyptic number.

233130121131 is a deficient number, since it is larger than the sum of its proper divisors (77710040381).

233130121131 is an equidigital number, since it uses as much as digits as its factorization.

233130121131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 77710040380.

The product of its (nonzero) digits is 324, while the sum is 21.

Adding to 233130121131 its reverse (131121031332), we get a palindrome (364251152463).

The spelling of 233130121131 in words is "two hundred thirty-three billion, one hundred thirty million, one hundred twenty-one thousand, one hundred thirty-one".