202010002010021 has 4 divisors (see below), whose sum is σ = 202023567937344. Its totient is φ = 201996436082700.

The previous prime is 202010002010009. The next prime is 202010002010051. The reversal of 202010002010021 is 120010200010202.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 202010002010021 - 2¹⁸ = 202010001747877 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 202010002009984 and 202010002010011.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (202010002010051) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6782941325 + ... + 6782971106.

It is an arithmetic number, because the mean of its divisors is an integer number (50505891984336).

Almost surely, 2^{202010002010021} is an apocalyptic number.

It is an amenable number.

202010002010021 is a deficient number, since it is larger than the sum of its proper divisors (13565927323).

202010002010021 is a wasteful number, since it uses less digits than its factorization.

202010002010021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13565927322.

The product of its (nonzero) digits is 16, while the sum is 11.

Adding to 202010002010021 its reverse (120010200010202), we get a palindrome (322020202020223).

The spelling of 202010002010021 in words is "two hundred two trillion, ten billion, two million, ten thousand, twenty-one".