371123745721 has 2 divisors, whose sum is σ = 371123745722. Its totient is φ = 371123745720.

The previous prime is 371123745683. The next prime is 371123745739. The reversal of 371123745721 is 127547321173.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 257288359696 + 113835386025 = 507236^2 + 337395^2 .

It is a cyclic number.

It is not a de Polignac number, because 371123745721 - 2²³ = 371115357113 is a prime.

It is not a weakly prime, because it can be changed into another prime (371123745821) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 185561872860 + 185561872861.

It is an arithmetic number, because the mean of its divisors is an integer number (185561872861).

Almost surely, 2^371123745721 is an apocalyptic number.

It is an amenable number.

371123745721 is a deficient number, since it is larger than the sum of its proper divisors (1).

371123745721 is an equidigital number, since it uses as much as digits as its factorization.

371123745721 is an evil number, because the sum of its binary digits is even.

The product of its digits is 246960, while the sum is 43.

The spelling of 371123745721 in words is "three hundred seventy-one billion, one hundred twenty-three million, seven hundred forty-five thousand, seven hundred twenty-one".