1250393983721 has 2 divisors, whose sum is σ = 1250393983722. Its totient is φ = 1250393983720.

The previous prime is 1250393983703. The next prime is 1250393983759. The reversal of 1250393983721 is 1273893930521.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 764216898025 + 486177085696 = 874195^2 + 697264^2 .

It is an emirp because it is prime and its reverse (1273893930521) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1250393983721 is a prime.

It is a super-2 number, since 2×1250393983721² (a number of 25 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (1250393983621) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 625196991860 + 625196991861.

It is an arithmetic number, because the mean of its divisors is an integer number (625196991861).

Almost surely, 2^{1250393983721} is an apocalyptic number.

It is an amenable number.

1250393983721 is a deficient number, since it is larger than the sum of its proper divisors (1).

1250393983721 is an equidigital number, since it uses as much as digits as its factorization.

1250393983721 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2449440, while the sum is 53.

The spelling of 1250393983721 in words is "one trillion, two hundred fifty billion, three hundred ninety-three million, nine hundred eighty-three thousand, seven hundred twenty-one".