2021002110021 has 16 divisors (see below), whose sum is σ = 2732995520640. Its totient is φ = 1328176899840.

The previous prime is 2021002109993. The next prime is 2021002110059. The reversal of 2021002110021 is 1200112001202.

It is not a de Polignac number, because 2021002110021 - 2²³ = 2020993721413 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 2021002109979 and 2021002110006.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2021002118021) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 925801 + ... + 2213393.

It is an arithmetic number, because the mean of its divisors is an integer number (170812220040).

Almost surely, 2^{2021002110021} is an apocalyptic number.

It is an amenable number.

2021002110021 is a deficient number, since it is larger than the sum of its proper divisors (711993410619).

2021002110021 is a wasteful number, since it uses less digits than its factorization.

2021002110021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1295036.

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

Adding to 2021002110021 its reverse (1200112001202), we get a palindrome (3221114111223).

The spelling of 2021002110021 in words is "two trillion, twenty-one billion, two million, one hundred ten thousand, twenty-one".