2021020102101 has 48 divisors (see below), whose sum is σ = 3637929438720. Its totient is φ = 969120509760.

The previous prime is 2021020102051. The next prime is 2021020102139. The reversal of 2021020102101 is 1012010201202.

It is not a de Polignac number, because 2021020102101 - 2⁷ = 2021020101973 is a prime.

It is a super-2 number, since 2×2021020102101² (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 (2021020102001) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 25845591 + ... + 25923668.

It is an arithmetic number, because the mean of its divisors is an integer number (75790196640).

Almost surely, 2^{2021020102101} is an apocalyptic number.

2021020102101 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

2021020102101 is a deficient number, since it is larger than the sum of its proper divisors (1616909336619).

2021020102101 is a wasteful number, since it uses less digits than its factorization.

2021020102101 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 51769306 (or 51769293 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 12.

Adding to 2021020102101 its reverse (1012010201202), we get a palindrome (3033030303303).

The spelling of 2021020102101 in words is "two trillion, twenty-one billion, twenty million, one hundred two thousand, one hundred one".