12367667553721 has 2 divisors, whose sum is σ = 12367667553722. Its totient is φ = 12367667553720.

The previous prime is 12367667553701. The next prime is 12367667553737. The reversal of 12367667553721 is 12735576676321.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 12140095621696 + 227571932025 = 3484264^2 + 477045^2 .

It is a cyclic number.

It is not a de Polignac number, because 12367667553721 - 2³⁹ = 11817911739833 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 12367667553721.

It is not a weakly prime, because it can be changed into another prime (12367667553701) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6183833776860 + 6183833776861.

It is an arithmetic number, because the mean of its divisors is an integer number (6183833776861).

Almost surely, 2^{12367667553721} is an apocalyptic number.

It is an amenable number.

12367667553721 is a deficient number, since it is larger than the sum of its proper divisors (1).

12367667553721 is an equidigital number, since it uses as much as digits as its factorization.

12367667553721 is an evil number, because the sum of its binary digits is even.

The product of its digits is 66679200, while the sum is 61.

The spelling of 12367667553721 in words is "twelve trillion, three hundred sixty-seven billion, six hundred sixty-seven million, five hundred fifty-three thousand, seven hundred twenty-one".