2101002102 has 48 divisors (see below), whose sum is σ = 4903229760. Its totient is φ = 648040176.

The previous prime is 2101002061. The next prime is 2101002143. The reversal of 2101002102 is 2012001012.

It is an interprime number because it is at equal distance from previous prime (2101002061) and next prime (2101002143).

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 23 ways as a sum of consecutive naturals, for example, 56728 + ... + 86139.

It is an arithmetic number, because the mean of its divisors is an integer number (102150620).

Almost surely, 2^2101002102 is an apocalyptic number.

2101002102 is an abundant number, since it is smaller than the sum of its proper divisors (2802227658).

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

2101002102 is a wasteful number, since it uses less digits than its factorization.

2101002102 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 142937 (or 142934 counting only the distinct ones).

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

The square root of 2101002102 is about 45836.6894746992. The cubic root of 2101002102 is about 1280.7828263961.

Adding to 2101002102 its reverse (2012001012), we get a palindrome (4113003114).

The spelling of 2101002102 in words is "two billion, one hundred one million, two thousand, one hundred two".