2100001020102 has 24 divisors (see below), whose sum is σ = 4553559728640. Its totient is φ = 699453029520.

The previous prime is 2100001020079. The next prime is 2100001020113. The reversal of 2100001020102 is 2010201000012.

It is a Harshad number since it is a multiple of its sum of digits (9).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 45585549 + ... + 45631592.

It is an arithmetic number, because the mean of its divisors is an integer number (189731655360).

Almost surely, 2^{2100001020102} is an apocalyptic number.

2100001020102 is an abundant number, since it is smaller than the sum of its proper divisors (2453558708538).

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

2100001020102 is a wasteful number, since it uses less digits than its factorization.

2100001020102 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 91218428 (or 91218425 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 9.

Adding to 2100001020102 its reverse (2010201000012), we get a palindrome (4110202020114).

The spelling of 2100001020102 in words is "two trillion, one hundred billion, one million, twenty thousand, one hundred two".