1325477823721 has 2 divisors, whose sum is σ = 1325477823722. Its totient is φ = 1325477823720.

The previous prime is 1325477823671. The next prime is 1325477823749. The reversal of 1325477823721 is 1273287745231.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1318739876496 + 6737947225 = 1148364^2 + 82085^2 .

It is a cyclic number.

It is not a de Polignac number, because 1325477823721 - 2⁹ = 1325477823209 is a prime.

It is a super-2 number, since 2×1325477823721² (a number of 25 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (1325477823821) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 662738911860 + 662738911861.

It is an arithmetic number, because the mean of its divisors is an integer number (662738911861).

Almost surely, 2^{1325477823721} is an apocalyptic number.

It is an amenable number.

1325477823721 is a deficient number, since it is larger than the sum of its proper divisors (1).

1325477823721 is an equidigital number, since it uses as much as digits as its factorization.

1325477823721 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3951360, while the sum is 52.

The spelling of 1325477823721 in words is "one trillion, three hundred twenty-five billion, four hundred seventy-seven million, eight hundred twenty-three thousand, seven hundred twenty-one".