221231213202 has 32 divisors (see below), whose sum is σ = 457539337152. Its totient is φ = 71272453824.

The previous prime is 221231213201. The next prime is 221231213257. The reversal of 221231213202 is 202312132122.

It is not an unprimeable number, because it can be changed into a prime (221231213201) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5170453 + ... + 5213064.

It is an arithmetic number, because the mean of its divisors is an integer number (14298104286).

Almost surely, 2^221231213202 is an apocalyptic number.

221231213202 is an abundant number, since it is smaller than the sum of its proper divisors (236308123950).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

221231213202 is a wasteful number, since it uses less digits than its factorization.

221231213202 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10383642.

The product of its (nonzero) digits is 576, while the sum is 21.

Adding to 221231213202 its reverse (202312132122), we get a palindrome (423543345324).

The spelling of 221231213202 in words is "two hundred twenty-one billion, two hundred thirty-one million, two hundred thirteen thousand, two hundred two".