12057021651 has 8 divisors (see below), whose sum is σ = 16077070224. Its totient is φ = 8037493760.

The previous prime is 12057021619. The next prime is 12057021661. The reversal of 12057021651 is 15612075021.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 12057021651 - 2⁵ = 12057021619 is a prime.

It is not an unprimeable number, because it can be changed into a prime (12057021661) 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 7 ways as a sum of consecutive naturals, for example, 72486 + ... + 171371.

It is an arithmetic number, because the mean of its divisors is an integer number (2009633778).

Almost surely, 2^12057021651 is an apocalyptic number.

12057021651 is a deficient number, since it is larger than the sum of its proper divisors (4020048573).

12057021651 is a wasteful number, since it uses less digits than its factorization.

12057021651 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 260341.

The product of its (nonzero) digits is 4200, while the sum is 30.

Adding to 12057021651 its reverse (15612075021), we get a palindrome (27669096672).

The spelling of 12057021651 in words is "twelve billion, fifty-seven million, twenty-one thousand, six hundred fifty-one".