202010002021221 has 16 divisors (see below), whose sum is σ = 269897283839040. Its totient is φ = 134398031604480.

The previous prime is 202010002021153. The next prime is 202010002021231. The reversal of 202010002021221 is 122120200010202.

It is not a de Polignac number, because 202010002021221 - 2¹⁵ = 202010001988453 is a prime.

It is a super-2 number, since 2×202010002021221² (a number of 29 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 202010002021221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (202010002021231) 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, 227773725 + ... + 228658893.

It is an arithmetic number, because the mean of its divisors is an integer number (16868580239940).

Almost surely, 2^{202010002021221} is an apocalyptic number.

It is an amenable number.

202010002021221 is a deficient number, since it is larger than the sum of its proper divisors (67887281817819).

202010002021221 is a wasteful number, since it uses less digits than its factorization.

202010002021221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1040596.

The product of its (nonzero) digits is 64, while the sum is 15.

Adding to 202010002021221 its reverse (122120200010202), we get a palindrome (324130202031423).

The spelling of 202010002021221 in words is "two hundred two trillion, ten billion, two million, twenty-one thousand, two hundred twenty-one".