1173993021571 has 2 divisors, whose sum is σ = 1173993021572. Its totient is φ = 1173993021570.

The previous prime is 1173993021563. The next prime is 1173993021647. The reversal of 1173993021571 is 1751203993711.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1173993021571 - 2³ = 1173993021563 is a prime.

It is a super-2 number, since 2×1173993021571² (a number of 25 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (1173993121571) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 586996510785 + 586996510786.

It is an arithmetic number, because the mean of its divisors is an integer number (586996510786).

Almost surely, 2^{1173993021571} is an apocalyptic number.

1173993021571 is a deficient number, since it is larger than the sum of its proper divisors (1).

1173993021571 is an equidigital number, since it uses as much as digits as its factorization.

1173993021571 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 357210, while the sum is 49.

The spelling of 1173993021571 in words is "one trillion, one hundred seventy-three billion, nine hundred ninety-three million, twenty-one thousand, five hundred seventy-one".