1372343118721 has 2 divisors, whose sum is σ = 1372343118722. Its totient is φ = 1372343118720.

The previous prime is 1372343118689. The next prime is 1372343118779. The reversal of 1372343118721 is 1278113432731.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1194946314496 + 177396804225 = 1093136^2 + 421185^2 .

It is a cyclic number.

It is not a de Polignac number, because 1372343118721 - 2⁵ = 1372343118689 is a prime.

It is not a weakly prime, because it can be changed into another prime (1372343118221) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 686171559360 + 686171559361.

It is an arithmetic number, because the mean of its divisors is an integer number (686171559361).

Almost surely, 2^{1372343118721} is an apocalyptic number.

It is an amenable number.

1372343118721 is a deficient number, since it is larger than the sum of its proper divisors (1).

1372343118721 is an equidigital number, since it uses as much as digits as its factorization.

1372343118721 is an evil number, because the sum of its binary digits is even.

The product of its digits is 169344, while the sum is 43.

The spelling of 1372343118721 in words is "one trillion, three hundred seventy-two billion, three hundred forty-three million, one hundred eighteen thousand, seven hundred twenty-one".