202021102221 has 8 divisors (see below), whose sum is σ = 269983553280. Its totient is φ = 134369692992.

The previous prime is 202021102183. The next prime is 202021102249. The reversal of 202021102221 is 122201120202.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 202021102221 - 2¹³ = 202021094029 is a prime.

It is a super-2 number, since 2×202021102221² (a number of 23 digits) contains 22 as substring.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 202021102221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (202021102271) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 77758941 + ... + 77761538.

It is an arithmetic number, because the mean of its divisors is an integer number (33747944160).

Almost surely, 2^202021102221 is an apocalyptic number.

It is an amenable number.

202021102221 is a deficient number, since it is larger than the sum of its proper divisors (67962451059).

202021102221 is a wasteful number, since it uses less digits than its factorization.

202021102221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 155520915.

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

Adding to 202021102221 its reverse (122201120202), we get a palindrome (324222222423).

The spelling of 202021102221 in words is "two hundred two billion, twenty-one million, one hundred two thousand, two hundred twenty-one".