2021102110021 has 32 divisors (see below), whose sum is σ = 2156656320000. Its totient is φ = 1887479193600.

The previous prime is 2021102110007. The next prime is 2021102110031. The reversal of 2021102110021 is 1200112011202.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2021102110021 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2021102109983 and 2021102110010.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2021102110031) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1618175605 + ... + 1618176853.

It is an arithmetic number, because the mean of its divisors is an integer number (67395510000).

Almost surely, 2^{2021102110021} is an apocalyptic number.

It is an amenable number.

2021102110021 is a deficient number, since it is larger than the sum of its proper divisors (135554209979).

2021102110021 is a wasteful number, since it uses less digits than its factorization.

2021102110021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2725.

The product of its (nonzero) digits is 16, while the sum is 13.

Adding to 2021102110021 its reverse (1200112011202), we get a palindrome (3221214121223).

The spelling of 2021102110021 in words is "two trillion, twenty-one billion, one hundred two million, one hundred ten thousand, twenty-one".