10821415963621 has 16 divisors (see below), whose sum is σ = 11702642503680. Its totient is φ = 9967408093440.

The previous prime is 10821415963619. The next prime is 10821415963651. The reversal of 10821415963621 is 12636951412801.

It is a cyclic number.

It is not a de Polignac number, because 10821415963621 - 2¹ = 10821415963619 is a prime.

It is a super-2 number, since 2×10821415963621² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10821415963651) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 10185340 + ... + 11197498.

It is an arithmetic number, because the mean of its divisors is an integer number (731415156480).

Almost surely, 2^{10821415963621} is an apocalyptic number.

It is an amenable number.

10821415963621 is a deficient number, since it is larger than the sum of its proper divisors (881226540059).

10821415963621 is a wasteful number, since it uses less digits than its factorization.

10821415963621 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1025604.

The product of its (nonzero) digits is 622080, while the sum is 49.

The spelling of 10821415963621 in words is "ten trillion, eight hundred twenty-one billion, four hundred fifteen million, nine hundred sixty-three thousand, six hundred twenty-one".