1021100020002 has 24 divisors (see below), whose sum is σ = 2245404026736. Its totient is φ = 335286573336.

The previous prime is 1021100019997. The next prime is 1021100020049. The reversal of 1021100020002 is 2000200011201.

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 11 ways as a sum of consecutive naturals, for example, 423340428 + ... + 423342839.

It is an arithmetic number, because the mean of its divisors is an integer number (93558501114).

Almost surely, 2^{1021100020002} is an apocalyptic number.

1021100020002 is an abundant number, since it is smaller than the sum of its proper divisors (1224304006734).

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

1021100020002 is a wasteful number, since it uses less digits than its factorization.

1021100020002 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 846683342 (or 846683339 counting only the distinct ones).

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

Adding to 1021100020002 its reverse (2000200011201), we get a palindrome (3021300031203).

The spelling of 1021100020002 in words is "one trillion, twenty-one billion, one hundred million, twenty thousand, two".