201021202112221 has 8 divisors (see below), whose sum is σ = 201111506668800. Its totient is φ = 200930902715280.

The previous prime is 201021202112141. The next prime is 201021202112261. The reversal of 201021202112221 is 122211202120102.

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

It is a cyclic number.

It is not a de Polignac number, because 201021202112221 - 2²⁹ = 201020665241309 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (201021202112261) 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, 77734440 + ... + 80278798.

It is an arithmetic number, because the mean of its divisors is an integer number (25138938333600).

Almost surely, 2^{201021202112221} is an apocalyptic number.

It is an amenable number.

201021202112221 is a deficient number, since it is larger than the sum of its proper divisors (90304556579).

201021202112221 is a wasteful number, since it uses less digits than its factorization.

201021202112221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2579819.

The product of its (nonzero) digits is 128, while the sum is 19.

Adding to 201021202112221 its reverse (122211202120102), we get a palindrome (323232404232323).

The spelling of 201021202112221 in words is "two hundred one trillion, twenty-one billion, two hundred two million, one hundred twelve thousand, two hundred twenty-one".