12721401967051 has 2 divisors, whose sum is σ = 12721401967052. Its totient is φ = 12721401967050.

The previous prime is 12721401967033. The next prime is 12721401967097. The reversal of 12721401967051 is 15076910412721.

It is an a-pointer prime, because the next prime (12721401967097) can be obtained adding 12721401967051 to its sum of digits (46).

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 12721401967051 - 2²⁹ = 12720865096139 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 12721401966992 and 12721401967010.

It is not a weakly prime, because it can be changed into another prime (12721401967951) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6360700983525 + 6360700983526.

It is an arithmetic number, because the mean of its divisors is an integer number (6360700983526).

Almost surely, 2^{12721401967051} is an apocalyptic number.

12721401967051 is a deficient number, since it is larger than the sum of its proper divisors (1).

12721401967051 is an equidigital number, since it uses as much as digits as its factorization.

12721401967051 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 211680, while the sum is 46.

The spelling of 12721401967051 in words is "twelve trillion, seven hundred twenty-one billion, four hundred one million, nine hundred sixty-seven thousand, fifty-one".