120121232231 has 48 divisors (see below), whose sum is σ = 165788023968. Its totient is φ = 85544928000.

The previous prime is 120121232221. The next prime is 120121232249. The reversal of 120121232231 is 132232121021.

It is not a de Polignac number, because 120121232231 - 2²² = 120117037927 is a prime.

It is a super-2 number, since 2×120121232231² (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 (120121232221) 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 47 ways as a sum of consecutive naturals, for example, 622841 + ... + 792573.

It is an arithmetic number, because the mean of its divisors is an integer number (3453917166).

Almost surely, 2^120121232231 is an apocalyptic number.

120121232231 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

120121232231 is a deficient number, since it is larger than the sum of its proper divisors (45666791737).

120121232231 is a wasteful number, since it uses less digits than its factorization.

120121232231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 169872 (or 169865 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 20.

Adding to 120121232231 its reverse (132232121021), we get a palindrome (252353353252).

The spelling of 120121232231 in words is "one hundred twenty billion, one hundred twenty-one million, two hundred thirty-two thousand, two hundred thirty-one".