12821151651 has 32 divisors (see below), whose sum is σ = 21489271296. Its totient is φ = 6660324000.

The previous prime is 12821151649. The next prime is 12821151743. The reversal of 12821151651 is 15615112821.

It is not a de Polignac number, because 12821151651 - 2¹ = 12821151649 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is not an unprimeable number, because it can be changed into a prime (12821155651) 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, 201400 + ... + 257301.

It is an arithmetic number, because the mean of its divisors is an integer number (671539728).

Almost surely, 2^12821151651 is an apocalyptic number.

12821151651 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

12821151651 is a deficient number, since it is larger than the sum of its proper divisors (8668119645).

12821151651 is an equidigital number, since it uses as much as digits as its factorization.

12821151651 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 458744 (or 458722 counting only the distinct ones).

The product of its digits is 4800, while the sum is 33.

The spelling of 12821151651 in words is "twelve billion, eight hundred twenty-one million, one hundred fifty-one thousand, six hundred fifty-one".