202101012221 has 32 divisors (see below), whose sum is σ = 216242611200. Its totient is φ = 188556480000.

The previous prime is 202101012199. The next prime is 202101012227. The reversal of 202101012221 is 122210101202.

It is a cyclic number.

It is not a de Polignac number, because 202101012221 - 2¹⁰ = 202101011197 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 202101012196 and 202101012205.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (202101012227) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 84595295 + ... + 84597683.

It is an arithmetic number, because the mean of its divisors is an integer number (6757581600).

Almost surely, 2^202101012221 is an apocalyptic number.

It is an amenable number.

202101012221 is a deficient number, since it is larger than the sum of its proper divisors (14141598979).

202101012221 is a wasteful number, since it uses less digits than its factorization.

202101012221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3221.

The product of its (nonzero) digits is 32, while the sum is 14.

Adding to 202101012221 its reverse (122210101202), we get a palindrome (324311113423).

The spelling of 202101012221 in words is "two hundred two billion, one hundred one million, twelve thousand, two hundred twenty-one".