120812155651 has 16 divisors (see below), whose sum is σ = 133044369408. Its totient is φ = 108792288000.

The previous prime is 120812155627. The next prime is 120812155721. The reversal of 120812155651 is 156551218021.

It is not a de Polignac number, because 120812155651 - 2¹¹ = 120812153603 is a prime.

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 120812155651.

It is not an unprimeable number, because it can be changed into a prime (120812155151) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 483310 + ... + 689356.

It is an arithmetic number, because the mean of its divisors is an integer number (8315273088).

Almost surely, 2^120812155651 is an apocalyptic number.

120812155651 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

120812155651 is a deficient number, since it is larger than the sum of its proper divisors (12232213757).

120812155651 is a wasteful number, since it uses less digits than its factorization.

120812155651 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 206562.

The product of its (nonzero) digits is 24000, while the sum is 37.

The spelling of 120812155651 in words is "one hundred twenty billion, eight hundred twelve million, one hundred fifty-five thousand, six hundred fifty-one".