201021120221 has 24 divisors (see below), whose sum is σ = 214182060960. Its totient is φ = 188145547200.

The previous prime is 201021120211. The next prime is 201021120227. The reversal of 201021120221 is 122021120102.

It is not a de Polignac number, because 201021120221 - 2²² = 201016925917 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 201021120196 and 201021120205.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (201021120227) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 124624811 + ... + 124626423.

It is an arithmetic number, because the mean of its divisors is an integer number (8924252540).

Almost surely, 2^201021120221 is an apocalyptic number.

It is an amenable number.

201021120221 is a deficient number, since it is larger than the sum of its proper divisors (13160940739).

201021120221 is a wasteful number, since it uses less digits than its factorization.

201021120221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2477 (or 2376 counting only the distinct ones).

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

Adding to 201021120221 its reverse (122021120102), we get a palindrome (323042240323).

The spelling of 201021120221 in words is "two hundred one billion, twenty-one million, one hundred twenty thousand, two hundred twenty-one".