139630016221 has 2 divisors, whose sum is σ = 139630016222. Its totient is φ = 139630016220.

The previous prime is 139630016219. The next prime is 139630016311. The reversal of 139630016221 is 122610036931.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 138123722500 + 1506293721 = 371650^2 + 38811^2 .

It is a cyclic number.

It is not a de Polignac number, because 139630016221 - 2¹ = 139630016219 is a prime.

Together with 139630016219, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (139630016021) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 69815008110 + 69815008111.

It is an arithmetic number, because the mean of its divisors is an integer number (69815008111).

Almost surely, 2^139630016221 is an apocalyptic number.

It is an amenable number.

139630016221 is a deficient number, since it is larger than the sum of its proper divisors (1).

139630016221 is an equidigital number, since it uses as much as digits as its factorization.

139630016221 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 11664, while the sum is 34.

The spelling of 139630016221 in words is "one hundred thirty-nine billion, six hundred thirty million, sixteen thousand, two hundred twenty-one".