2100210001002 has 24 divisors (see below), whose sum is σ = 4627581360480. Its totient is φ = 688204406760.

The previous prime is 2100210000997. The next prime is 2100210001007. The reversal of 2100210001002 is 2001000120012.

It is an interprime number because it is at equal distance from previous prime (2100210000997) and next prime (2100210001007).

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 (2100210001007) 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, 988798374 + ... + 988800497.

It is an arithmetic number, because the mean of its divisors is an integer number (192815890020).

Almost surely, 2^{2100210001002} is an apocalyptic number.

2100210001002 is an abundant number, since it is smaller than the sum of its proper divisors (2527371359478).

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

2100210001002 is a wasteful number, since it uses less digits than its factorization.

2100210001002 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1977598938 (or 1977598935 counting only the distinct ones).

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

Adding to 2100210001002 its reverse (2001000120012), we get a palindrome (4101210121014).

The spelling of 2100210001002 in words is "two trillion, one hundred billion, two hundred ten million, one thousand, two".