139727700121 has 2 divisors, whose sum is σ = 139727700122. Its totient is φ = 139727700120.

The previous prime is 139727700061. The next prime is 139727700127. The reversal of 139727700121 is 121007727931.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 139174509721 + 553190400 = 373061^2 + 23520^2 .

It is a cyclic number.

It is not a de Polignac number, because 139727700121 - 2¹⁵ = 139727667353 is a prime.

It is a super-2 number, since 2×139727700121² (a number of 23 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (139727700127) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 69863850060 + 69863850061.

It is an arithmetic number, because the mean of its divisors is an integer number (69863850061).

Almost surely, 2^139727700121 is an apocalyptic number.

It is an amenable number.

139727700121 is a deficient number, since it is larger than the sum of its proper divisors (1).

139727700121 is an equidigital number, since it uses as much as digits as its factorization.

139727700121 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 37044, while the sum is 40.

The spelling of 139727700121 in words is "one hundred thirty-nine billion, seven hundred twenty-seven million, seven hundred thousand, one hundred twenty-one".