221312220132 has 48 divisors (see below), whose sum is σ = 524793427200. Its totient is φ = 72577639680.

The previous prime is 221312220121. The next prime is 221312220139. The reversal of 221312220132 is 231022213122.

It is a junction number, because it is equal to n+sod(n) for n = 221312220099 and 221312220108.

It is not an unprimeable number, because it can be changed into a prime (221312220139) 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, 149007 + ... + 681782.

It is an arithmetic number, because the mean of its divisors is an integer number (10933196400).

Almost surely, 2^221312220132 is an apocalyptic number.

It is an amenable number.

221312220132 is an abundant number, since it is smaller than the sum of its proper divisors (303481207068).

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

221312220132 is a wasteful number, since it uses less digits than its factorization.

221312220132 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 831156 (or 831154 counting only the distinct ones).

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

Adding to 221312220132 its reverse (231022213122), we get a palindrome (452334433254).

The spelling of 221312220132 in words is "two hundred twenty-one billion, three hundred twelve million, two hundred twenty thousand, one hundred thirty-two".