10002444621621 has 4 divisors (see below), whose sum is σ = 13336592828832. Its totient is φ = 6668296414412.

The previous prime is 10002444621539. The next prime is 10002444621667. The reversal of 10002444621621 is 12612644420001.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 10002444621621 - 2⁷ = 10002444621493 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10002444621721) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1667074103601 + ... + 1667074103606.

It is an arithmetic number, because the mean of its divisors is an integer number (3334148207208).

Almost surely, 2^{10002444621621} is an apocalyptic number.

It is an amenable number.

10002444621621 is a deficient number, since it is larger than the sum of its proper divisors (3334148207211).

10002444621621 is an equidigital number, since it uses as much as digits as its factorization.

10002444621621 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3334148207210.

The product of its (nonzero) digits is 18432, while the sum is 33.

The spelling of 10002444621621 in words is "ten trillion, two billion, four hundred forty-four million, six hundred twenty-one thousand, six hundred twenty-one".