120813231 has 32 divisors (see below), whose sum is σ = 207323136. Its totient is φ = 60732000.

The previous prime is 120813211. The next prime is 120813233. The reversal of 120813231 is 132318021.

It is not a de Polignac number, because 120813231 - 2¹¹ = 120811183 is a prime.

It is a super-2 number, since 2×120813231² = 29191673569318722, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a junction number, because it is equal to n+sod(n) for n = 120813198 and 120813207.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (120813233) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1275 + ... + 15596.

It is an arithmetic number, because the mean of its divisors is an integer number (6478848).

Almost surely, 2^120813231 is an apocalyptic number.

120813231 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

120813231 is a deficient number, since it is larger than the sum of its proper divisors (86509905).

120813231 is a wasteful number, since it uses less digits than its factorization.

120813231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16923.

The product of its (nonzero) digits is 288, while the sum is 21.

The square root of 120813231 is about 10991.5072214870. The cubic root of 120813231 is about 494.3541295837.

The spelling of 120813231 in words is "one hundred twenty million, eight hundred thirteen thousand, two hundred thirty-one".