120131220231 has 16 divisors (see below), whose sum is σ = 194151467520. Its totient is φ = 72806799960.

The previous prime is 120131220227. The next prime is 120131220299. The reversal of 120131220231 is 132022131021.

120131220231 is a `hidden beast` number, since 120 + 1 + 312 + 2 + 0 + 231 = 666.

It is not a de Polignac number, because 120131220231 - 2² = 120131220227 is a prime.

It is a super-2 number, since 2×120131220231² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (120131220211) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 202240815 + ... + 202241408.

It is an arithmetic number, because the mean of its divisors is an integer number (12134466720).

Almost surely, 2^120131220231 is an apocalyptic number.

120131220231 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

120131220231 is a deficient number, since it is larger than the sum of its proper divisors (74020247289).

120131220231 is a wasteful number, since it uses less digits than its factorization.

120131220231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 404482243 (or 404482237 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 18.

Adding to 120131220231 its reverse (132022131021), we get a palindrome (252153351252).

The spelling of 120131220231 in words is "one hundred twenty billion, one hundred thirty-one million, two hundred twenty thousand, two hundred thirty-one".