202010020001021 has 4 divisors (see below), whose sum is σ = 203971282331232. Its totient is φ = 200048757670812.

The previous prime is 202010020000961. The next prime is 202010020001047. The reversal of 202010020001021 is 120100020010202.

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 202010020001021 - 2¹⁴ = 202010019984637 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 202010020000993 and 202010020001011.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (202010020004021) 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, 980631164951 + ... + 980631165156.

It is an arithmetic number, because the mean of its divisors is an integer number (50992820582808).

Almost surely, 2^{202010020001021} is an apocalyptic number.

It is an amenable number.

202010020001021 is a deficient number, since it is larger than the sum of its proper divisors (1961262330211).

202010020001021 is a wasteful number, since it uses less digits than its factorization.

202010020001021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1961262330210.

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

Adding to 202010020001021 its reverse (120100020010202), we get a palindrome (322110040011223).

The spelling of 202010020001021 in words is "two hundred two trillion, ten billion, twenty million, one thousand, twenty-one".