201221321023233 has 56 divisors (see below), whose sum is σ = 354111841162688. Its totient is φ = 111875946718752.

The previous prime is 201221321023231. The next prime is 201221321023253. The reversal of 201221321023233 is 332320123122102.

201221321023233 is a `hidden beast` number, since 2 + 0 + 1 + 2 + 213 + 210 + 2 + 3 + 233 = 666.

201221321023233 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 201221321023233 - 2¹ = 201221321023231 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a junction number, because it is equal to n+sod(n) for n = 201221321023197 and 201221321023206.

It is not an unprimeable number, because it can be changed into a prime (201221321023231) by changing a digit.

It is a polite number, since it can be written in 55 ways as a sum of consecutive naturals, for example, 532675591 + ... + 533053212.

It is an arithmetic number, because the mean of its divisors is an integer number (6323425735048).

Almost surely, 2^{201221321023233} is an apocalyptic number.

It is an amenable number.

201221321023233 is a deficient number, since it is larger than the sum of its proper divisors (152890520139455).

201221321023233 is an equidigital number, since it uses as much as digits as its factorization.

201221321023233 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1065728865 (or 1065728850 counting only the distinct ones).

The product of its (nonzero) digits is 5184, while the sum is 27.

Adding to 201221321023233 its reverse (332320123122102), we get a palindrome (533541444145335).

The spelling of 201221321023233 in words is "two hundred one trillion, two hundred twenty-one billion, three hundred twenty-one million, twenty-three thousand, two hundred thirty-three".