139392711121 has 2 divisors, whose sum is σ = 139392711122. Its totient is φ = 139392711120.

The previous prime is 139392711083. The next prime is 139392711137. The reversal of 139392711121 is 121117293931.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 76109774400 + 63282936721 = 275880^2 + 251561^2 .

It is a cyclic number.

It is not a de Polignac number, because 139392711121 - 2⁷ = 139392710993 is a prime.

It is not a weakly prime, because it can be changed into another prime (139392711191) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 69696355560 + 69696355561.

It is an arithmetic number, because the mean of its divisors is an integer number (69696355561).

Almost surely, 2^139392711121 is an apocalyptic number.

It is an amenable number.

139392711121 is a deficient number, since it is larger than the sum of its proper divisors (1).

139392711121 is an equidigital number, since it uses as much as digits as its factorization.

139392711121 is an evil number, because the sum of its binary digits is even.

The product of its digits is 20412, while the sum is 40.

The spelling of 139392711121 in words is "one hundred thirty-nine billion, three hundred ninety-two million, seven hundred eleven thousand, one hundred twenty-one".