202101210022221 has 20 divisors (see below), whose sum is σ = 303572256151164. Its totient is φ = 133989752491200.

The previous prime is 202101210022213. The next prime is 202101210022241. The reversal of 202101210022221 is 122220012101202.

It is a happy number.

202101210022221 is a `hidden beast` number, since 2 + 0 + 210 + 1 + 210 + 0 + 22 + 221 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 20654652578121 + 181446557444100 = 4544739^2 + 13470210^2 .

It is not a de Polignac number, because 202101210022221 - 2³ = 202101210022213 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 202101210022194 and 202101210022203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (202101210022241) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 6892462320 + ... + 6892491641.

Almost surely, 2^{202101210022221} is an apocalyptic number.

It is an amenable number.

202101210022221 is a deficient number, since it is larger than the sum of its proper divisors (101471046128943).

202101210022221 is a wasteful number, since it uses less digits than its factorization.

202101210022221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13784954154 (or 13784954145 counting only the distinct ones).

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

Adding to 202101210022221 its reverse (122220012101202), we get a palindrome (324321222123423).

The spelling of 202101210022221 in words is "two hundred two trillion, one hundred one billion, two hundred ten million, twenty-two thousand, two hundred twenty-one".