120920831 has 4 divisors (see below), whose sum is σ = 120943032. Its totient is φ = 120898632.

The previous prime is 120920819. The next prime is 120920861. The reversal of 120920831 is 138029021.

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

It is a cyclic number.

It is not a de Polignac number, because 120920831 - 2¹⁰ = 120919807 is a prime.

It is a super-2 number, since 2×120920831² = 29243694739461122, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 120920831.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (120920861) 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, 3281 + ... + 15893.

It is an arithmetic number, because the mean of its divisors is an integer number (30235758).

Almost surely, 2^120920831 is an apocalyptic number.

120920831 is a deficient number, since it is larger than the sum of its proper divisors (22201).

120920831 is an equidigital number, since it uses as much as digits as its factorization.

120920831 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22200.

The product of its (nonzero) digits is 864, while the sum is 26.

The square root of 120920831 is about 10996.4008202684. The cubic root of 120920831 is about 494.5008483939.

Adding to 120920831 its reverse (138029021), we get a palindrome (258949852).

The spelling of 120920831 in words is "one hundred twenty million, nine hundred twenty thousand, eight hundred thirty-one".