2102021310101 has 4 divisors (see below), whose sum is σ = 2102167613100. Its totient is φ = 2101875007104.

The previous prime is 2102021310097. The next prime is 2102021310107. The reversal of 2102021310101 is 1010131202012.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 1776435808900 + 325585501201 = 1332830^2 + 570601^2 .

It is a cyclic number.

It is not a de Polignac number, because 2102021310101 - 2² = 2102021310097 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2102021310107) 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 3 ways as a sum of consecutive naturals, for example, 73129946 + ... + 73158683.

It is an arithmetic number, because the mean of its divisors is an integer number (525541903275).

Almost surely, 2^{2102021310101} is an apocalyptic number.

It is an amenable number.

2102021310101 is a deficient number, since it is larger than the sum of its proper divisors (146302999).

2102021310101 is a wasteful number, since it uses less digits than its factorization.

2102021310101 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 146302998.

The product of its (nonzero) digits is 24, while the sum is 14.

Adding to 2102021310101 its reverse (1010131202012), we get a palindrome (3112152512113).

The spelling of 2102021310101 in words is "two trillion, one hundred two billion, twenty-one million, three hundred ten thousand, one hundred one".