21233220201 has 96 divisors (see below), whose sum is σ = 35349350400. Its totient is φ = 12668223744.

The previous prime is 21233220193. The next prime is 21233220209. The reversal of 21233220201 is 10202233212.

21233220201 is a `hidden beast` number, since 212 + 33 + 220 + 201 = 666.

It is an interprime number because it is at equal distance from previous prime (21233220193) and next prime (21233220209).

It is not a de Polignac number, because 21233220201 - 2³ = 21233220193 is a prime.

It is not an unprimeable number, because it can be changed into a prime (21233220209) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 18907026 + ... + 18908148.

It is an arithmetic number, because the mean of its divisors is an integer number (368222400).

Almost surely, 2^21233220201 is an apocalyptic number.

It is an amenable number.

21233220201 is a deficient number, since it is larger than the sum of its proper divisors (14116130199).

21233220201 is a wasteful number, since it uses less digits than its factorization.

21233220201 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1377 (or 1365 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 18.

Adding to 21233220201 its reverse (10202233212), we get a palindrome (31435453413).

The spelling of 21233220201 in words is "twenty-one billion, two hundred thirty-three million, two hundred twenty thousand, two hundred one".