2102110131021 has 16 divisors (see below), whose sum is σ = 2806546555200. Its totient is φ = 1399541321088.

The previous prime is 2102110131013. The next prime is 2102110131053. The reversal of 2102110131021 is 1201310112012.

It is not a de Polignac number, because 2102110131021 - 2³ = 2102110131013 is a prime.

It is a super-2 number, since 2×2102110131021² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2102110131421) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7673865 + ... + 7943073.

It is an arithmetic number, because the mean of its divisors is an integer number (175409159700).

Almost surely, 2^{2102110131021} is an apocalyptic number.

It is an amenable number.

2102110131021 is a deficient number, since it is larger than the sum of its proper divisors (704436424179).

2102110131021 is a wasteful number, since it uses less digits than its factorization.

2102110131021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 272668.

The product of its (nonzero) digits is 24, while the sum is 15.

Adding to 2102110131021 its reverse (1201310112012), we get a palindrome (3303420243033).

The spelling of 2102110131021 in words is "two trillion, one hundred two billion, one hundred ten million, one hundred thirty-one thousand, twenty-one".