221132330312 has 48 divisors (see below), whose sum is σ = 458930264940. Its totient is φ = 99537794048.

The previous prime is 221132330297. The next prime is 221132330317. The reversal of 221132330312 is 213033231122.

221132330312 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 212489653156 + 8642677156 = 460966^2 + 92966^2 .

It is a Harshad number since it is a multiple of its sum of digits (23).

It is not an unprimeable number, because it can be changed into a prime (221132330317) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1464893 + ... + 1608780.

Almost surely, 2^221132330312 is an apocalyptic number.

It is an amenable number.

221132330312 is an abundant number, since it is smaller than the sum of its proper divisors (237797934628).

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

221132330312 is a wasteful number, since it uses less digits than its factorization.

221132330312 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3073742 (or 3073715 counting only the distinct ones).

The product of its (nonzero) digits is 1296, while the sum is 23.

Adding to 221132330312 its reverse (213033231122), we get a palindrome (434165561434).

The spelling of 221132330312 in words is "two hundred twenty-one billion, one hundred thirty-two million, three hundred thirty thousand, three hundred twelve".