221002112201 has 24 divisors (see below), whose sum is σ = 250064587080. Its totient is φ = 194140590336.

The previous prime is 221002112171. The next prime is 221002112203. The reversal of 221002112201 is 102211200122.

It can be written as a sum of positive squares in 4 ways, for example, as 30274260025 + 190727852176 = 173995^2 + 436724^2 .

It is not a de Polignac number, because 221002112201 - 2⁶ = 221002112137 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (221002112203) 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, 1273205 + ... + 1436333.

It is an arithmetic number, because the mean of its divisors is an integer number (10419357795).

Almost surely, 2^221002112201 is an apocalyptic number.

It is an amenable number.

221002112201 is a deficient number, since it is larger than the sum of its proper divisors (29062474879).

221002112201 is a wasteful number, since it uses less digits than its factorization.

221002112201 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 163385 (or 163362 counting only the distinct ones).

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

Adding to 221002112201 its reverse (102211200122), we get a palindrome (323213312323).

It can be divided in two parts, 2210021 and 12201, that added together give a palindrome (2222222).

The spelling of 221002112201 in words is "two hundred twenty-one billion, two million, one hundred twelve thousand, two hundred one".