201220110212021 has 16 divisors (see below), whose sum is σ = 205222636317888. Its totient is φ = 197225244278400.

The previous prime is 201220110211993. The next prime is 201220110212057. The reversal of 201220110212021 is 120212011022102.

201220110212021 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a cyclic number.

It is not a de Polignac number, because 201220110212021 - 2¹⁸ = 201220109949877 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (201220110212221) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 649338206 + ... + 649648016.

It is an arithmetic number, because the mean of its divisors is an integer number (12826414769868).

Almost surely, 2^{201220110212021} is an apocalyptic number.

It is an amenable number.

201220110212021 is a deficient number, since it is larger than the sum of its proper divisors (4002526105867).

201220110212021 is a wasteful number, since it uses less digits than its factorization.

201220110212021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 322132.

The product of its (nonzero) digits is 64, while the sum is 17.

Adding to 201220110212021 its reverse (120212011022102), we get a palindrome (321432121234123).

The spelling of 201220110212021 in words is "two hundred one trillion, two hundred twenty billion, one hundred ten million, two hundred twelve thousand, twenty-one".