235131120121 has 4 divisors (see below), whose sum is σ = 236067897744. Its totient is φ = 234194342500.

The previous prime is 235131120061. The next prime is 235131120139. The reversal of 235131120121 is 121021131532.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-235131120121 is a prime.

It is a super-2 number, since 2×235131120121² (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 = 235131120092 and 235131120101.

It is not an unprimeable number, because it can be changed into a prime (235131120151) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 468388435 + ... + 468388936.

It is an arithmetic number, because the mean of its divisors is an integer number (59016974436).

Almost surely, 2^235131120121 is an apocalyptic number.

It is an amenable number.

235131120121 is a deficient number, since it is larger than the sum of its proper divisors (936777623).

235131120121 is an equidigital number, since it uses as much as digits as its factorization.

235131120121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 936777622.

The product of its (nonzero) digits is 360, while the sum is 22.

Adding to 235131120121 its reverse (121021131532), we get a palindrome (356152251653).

The spelling of 235131120121 in words is "two hundred thirty-five billion, one hundred thirty-one million, one hundred twenty thousand, one hundred twenty-one".