140104165021 has 2 divisors, whose sum is σ = 140104165022. Its totient is φ = 140104165020.

The previous prime is 140104164979. The next prime is 140104165027. The reversal of 140104165021 is 120561401041.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 114372476100 + 25731688921 = 338190^2 + 160411^2 .

It is a cyclic number.

It is not a de Polignac number, because 140104165021 - 2²³ = 140095776413 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (140104165027) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 70052082510 + 70052082511.

It is an arithmetic number, because the mean of its divisors is an integer number (70052082511).

Almost surely, 2^140104165021 is an apocalyptic number.

It is an amenable number.

140104165021 is a deficient number, since it is larger than the sum of its proper divisors (1).

140104165021 is an equidigital number, since it uses as much as digits as its factorization.

140104165021 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 960, while the sum is 25.

Adding to 140104165021 its reverse (120561401041), we get a palindrome (260665566062).

The spelling of 140104165021 in words is "one hundred forty billion, one hundred four million, one hundred sixty-five thousand, twenty-one".