2100021010002 has 64 divisors (see below), whose sum is σ = 4699458677760. Its totient is φ = 695111041152.

The previous prime is 2100021009971. The next prime is 2100021010057. The reversal of 2100021010002 is 2000101200012.

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

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 4561038 + ... + 5000310.

It is an arithmetic number, because the mean of its divisors is an integer number (73429041840).

Almost surely, 2^{2100021010002} is an apocalyptic number.

2100021010002 is an abundant number, since it is smaller than the sum of its proper divisors (2599437667758).

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

2100021010002 is a wasteful number, since it uses less digits than its factorization.

2100021010002 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 439904 (or 439898 counting only the distinct ones).

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

Adding to 2100021010002 its reverse (2000101200012), we get a palindrome (4100122210014).

The spelling of 2100021010002 in words is "two trillion, one hundred billion, twenty-one million, ten thousand, two".