10113639421 has 2 divisors, whose sum is σ = 10113639422. Its totient is φ = 10113639420.

The previous prime is 10113639407. The next prime is 10113639463. The reversal of 10113639421 is 12493631101.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 5478072196 + 4635567225 = 74014^2 + 68085^2 .

It is a cyclic number.

It is not a de Polignac number, because 10113639421 - 2²¹ = 10111542269 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (10113639401) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5056819710 + 5056819711.

It is an arithmetic number, because the mean of its divisors is an integer number (5056819711).

Almost surely, 2^10113639421 is an apocalyptic number.

It is an amenable number.

10113639421 is a deficient number, since it is larger than the sum of its proper divisors (1).

10113639421 is an equidigital number, since it uses as much as digits as its factorization.

10113639421 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3888, while the sum is 31.

The spelling of 10113639421 in words is "ten billion, one hundred thirteen million, six hundred thirty-nine thousand, four hundred twenty-one".