2100010021002 has 80 divisors (see below), whose sum is σ = 4857938883072. Its totient is φ = 677343371040.

The previous prime is 2100010021001. The next prime is 2100010021069. The reversal of 2100010021002 is 2001200100012.

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

It is not an unprimeable number, because it can be changed into a prime (2100010021001) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 55459108 + ... + 55496960.

Almost surely, 2^{2100010021002} is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2100010021002, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2428969441536).

2100010021002 is an abundant number, since it is smaller than the sum of its proper divisors (2757928862070).

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

2100010021002 is a wasteful number, since it uses less digits than its factorization.

2100010021002 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 48945 (or 48936 counting only the distinct ones).

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

Adding to 2100010021002 its reverse (2001200100012), we get a palindrome (4101210121014).

The spelling of 2100010021002 in words is "two trillion, one hundred billion, ten million, twenty-one thousand, two".