201232021221 has 160 divisors (see below), whose sum is σ = 385879431168. Its totient is φ = 101471045760.

The previous prime is 201232021099. The next prime is 201232021231. The reversal of 201232021221 is 122120232102.

201232021221 is a `hidden beast` number, since 201 + 232 + 0 + 212 + 21 = 666.

It is not a de Polignac number, because 201232021221 - 2⁷ = 201232021093 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 201232021194 and 201232021203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (201232021231) by changing a digit.

It is a polite number, since it can be written in 159 ways as a sum of consecutive naturals, for example, 44785651 + ... + 44790143.

Almost surely, 2^201232021221 is an apocalyptic number.

201232021221 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

201232021221 is a deficient number, since it is larger than the sum of its proper divisors (184647409947).

201232021221 is a wasteful number, since it uses less digits than its factorization.

201232021221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4733 (or 4724 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 18.

Adding to 201232021221 its reverse (122120232102), we get a palindrome (323352253323).

The spelling of 201232021221 in words is "two hundred one billion, two hundred thirty-two million, twenty-one thousand, two hundred twenty-one".