202011202021221 has 24 divisors (see below), whose sum is σ = 292151450814080. Its totient is φ = 134509144353696.

The previous prime is 202011202021157. The next prime is 202011202021231. The reversal of 202011202021221 is 122120202110202.

It is a happy number.

202011202021221 is a `hidden beast` number, since 20 + 201 + 1 + 20 + 202 + 1 + 221 = 666.

It is not a de Polignac number, because 202011202021221 - 2⁶ = 202011202021157 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 202011202021194 and 202011202021203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (202011202021231) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 448203240 + ... + 448653726.

Almost surely, 2^{202011202021221} is an apocalyptic number.

It is an amenable number.

202011202021221 is a deficient number, since it is larger than the sum of its proper divisors (90140248792859).

202011202021221 is a wasteful number, since it uses less digits than its factorization.

202011202021221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 511425 (or 511422 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 18.

Adding to 202011202021221 its reverse (122120202110202), we get a palindrome (324131404131423).

The spelling of 202011202021221 in words is "two hundred two trillion, eleven billion, two hundred two million, twenty-one thousand, two hundred twenty-one".