2101100100102 has 16 divisors (see below), whose sum is σ = 4669111333680. Its totient is φ = 700366700016.

The previous prime is 2101100100101. The next prime is 2101100100109. The reversal of 2101100100102 is 2010010011012.

It is a happy number.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2101100100101) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 19454630503 + ... + 19454630610.

It is an arithmetic number, because the mean of its divisors is an integer number (291819458355).

Almost surely, 2^{2101100100102} is an apocalyptic number.

2101100100102 is an abundant number, since it is smaller than the sum of its proper divisors (2568011233578).

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

2101100100102 is a wasteful number, since it uses less digits than its factorization.

2101100100102 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38909261124 (or 38909261118 counting only the distinct ones).

The product of its (nonzero) digits is 4, while the sum is 9.

Adding to 2101100100102 its reverse (2010010011012), we get a palindrome (4111110111114).

The spelling of 2101100100102 in words is "two trillion, one hundred one billion, one hundred million, one hundred thousand, one hundred two".