10501138621 has 2 divisors, whose sum is σ = 10501138622. Its totient is φ = 10501138620.

The previous prime is 10501138603. The next prime is 10501138643. The reversal of 10501138621 is 12683110501.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 10501125625 + 12996 = 102475^2 + 114^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-10501138621 is a prime.

It is a super-2 number, since 2×10501138621² (a number of 21 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 10501138621.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (10501138601) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5250569310 + 5250569311.

It is an arithmetic number, because the mean of its divisors is an integer number (5250569311).

Almost surely, 2^10501138621 is an apocalyptic number.

It is an amenable number.

10501138621 is a deficient number, since it is larger than the sum of its proper divisors (1).

10501138621 is an equidigital number, since it uses as much as digits as its factorization.

10501138621 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1440, while the sum is 28.

The spelling of 10501138621 in words is "ten billion, five hundred one million, one hundred thirty-eight thousand, six hundred twenty-one".