2100021202044 has 72 divisors (see below), whose sum is σ = 5408908635312. Its totient is φ = 686753233920.

The previous prime is 2100021202043. The next prime is 2100021202057. The reversal of 2100021202044 is 4402021200012.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2100021202043) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 39356367 + ... + 39409689.

It is an arithmetic number, because the mean of its divisors is an integer number (75123731046).

Almost surely, 2^{2100021202044} is an apocalyptic number.

It is an amenable number.

2100021202044 is an abundant number, since it is smaller than the sum of its proper divisors (3308887433268).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

2100021202044 is a wasteful number, since it uses less digits than its factorization.

2100021202044 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 74027 (or 74022 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 18.

Adding to 2100021202044 its reverse (4402021200012), we get a palindrome (6502042402056).

The spelling of 2100021202044 in words is "two trillion, one hundred billion, twenty-one million, two hundred two thousand, forty-four".