2100210021100 has 36 divisors (see below), whose sum is σ = 4561633302408. Its totient is φ = 839313952000.

The previous prime is 2100210021083. The next prime is 2100210021103. The reversal of 2100210021100 is 11200120012.

It is a Harshad number since it is a multiple of its sum of digits (10).

It is not an unprimeable number, because it can be changed into a prime (2100210021103) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 9516061 + ... + 9734260.

It is an arithmetic number, because the mean of its divisors is an integer number (126712036178).

Almost surely, 2^{2100210021100} is an apocalyptic number.

2100210021100 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2100210021100 is an abundant number, since it is smaller than the sum of its proper divisors (2461423281308).

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

2100210021100 is a wasteful number, since it uses less digits than its factorization.

2100210021100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19251426 (or 19251419 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 10.

Adding to 2100210021100 its reverse (11200120012), we get a palindrome (2111410141112).

The spelling of 2100210021100 in words is "two trillion, one hundred billion, two hundred ten million, twenty-one thousand, one hundred".