12721234651 has 2 divisors, whose sum is σ = 12721234652. Its totient is φ = 12721234650.

The previous prime is 12721234613. The next prime is 12721234667. The reversal of 12721234651 is 15643212721.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 12721234651 - 2⁷ = 12721234523 is a prime.

It is a super-2 number, since 2×12721234651² (a number of 21 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (12721237651) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6360617325 + 6360617326.

It is an arithmetic number, because the mean of its divisors is an integer number (6360617326).

Almost surely, 2^12721234651 is an apocalyptic number.

12721234651 is a deficient number, since it is larger than the sum of its proper divisors (1).

12721234651 is an equidigital number, since it uses as much as digits as its factorization.

12721234651 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 20160, while the sum is 34.

The spelling of 12721234651 in words is "twelve billion, seven hundred twenty-one million, two hundred thirty-four thousand, six hundred fifty-one".