2121630444653 has 16 divisors (see below), whose sum is σ = 2252675166720. Its totient is φ = 1994666990400.

The previous prime is 2121630444581. The next prime is 2121630444673. The reversal of 2121630444653 is 3564440361212.

It is a cyclic number.

It is not a de Polignac number, because 2121630444653 - 2³² = 2117335477357 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 2121630444653.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2121630444673) 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, 647558 + ... + 2159303.

It is an arithmetic number, because the mean of its divisors is an integer number (140792197920).

Almost surely, 2^{2121630444653} is an apocalyptic number.

It is an amenable number.

2121630444653 is a deficient number, since it is larger than the sum of its proper divisors (131044722067).

2121630444653 is a wasteful number, since it uses less digits than its factorization.

2121630444653 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2807588.

The product of its (nonzero) digits is 414720, while the sum is 41.

The spelling of 2121630444653 in words is "two trillion, one hundred twenty-one billion, six hundred thirty million, four hundred forty-four thousand, six hundred fifty-three".