202001101020021 has 16 divisors (see below), whose sum is σ = 269364058407360. Its totient is φ = 134652772826880.

The previous prime is 202001101019957. The next prime is 202001101020031. The reversal of 202001101020021 is 120020101100202.

It is not a de Polignac number, because 202001101020021 - 2⁶ = 202001101019957 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 202001101019979 and 202001101020006.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (202001101020031) 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, 1962477085 + ... + 1962580013.

It is an arithmetic number, because the mean of its divisors is an integer number (16835253650460).

Almost surely, 2^{202001101020021} is an apocalyptic number.

It is an amenable number.

202001101020021 is a deficient number, since it is larger than the sum of its proper divisors (67362957387339).

202001101020021 is a wasteful number, since it uses less digits than its factorization.

202001101020021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 167636.

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

Adding to 202001101020021 its reverse (120020101100202), we get a palindrome (322021202120223).

The spelling of 202001101020021 in words is "two hundred two trillion, one billion, one hundred one million, twenty thousand, twenty-one".