120520232551 has 4 divisors (see below), whose sum is σ = 120592705792. Its totient is φ = 120447759312.

The previous prime is 120520232533. The next prime is 120520232617. The reversal of 120520232551 is 155232025021.

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 120520232551 - 2³³ = 111930297959 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (120520232251) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 36234126 + ... + 36237451.

It is an arithmetic number, because the mean of its divisors is an integer number (30148176448).

Almost surely, 2^120520232551 is an apocalyptic number.

120520232551 is a deficient number, since it is larger than the sum of its proper divisors (72473241).

120520232551 is an equidigital number, since it uses as much as digits as its factorization.

120520232551 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 72473240.

The product of its (nonzero) digits is 6000, while the sum is 28.

Adding to 120520232551 its reverse (155232025021), we get a palindrome (275752257572).

The spelling of 120520232551 in words is "one hundred twenty billion, five hundred twenty million, two hundred thirty-two thousand, five hundred fifty-one".