221331220132 has 96 divisors (see below), whose sum is σ = 434801727360. Its totient is φ = 97741701120.

The previous prime is 221331220067. The next prime is 221331220133. The reversal of 221331220132 is 231022133122.

It is a Harshad number since it is a multiple of its sum of digits (22).

It is not an unprimeable number, because it can be changed into a prime (221331220133) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 51602244 + ... + 51606532.

It is an arithmetic number, because the mean of its divisors is an integer number (4529184660).

Almost surely, 2^221331220132 is an apocalyptic number.

221331220132 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

221331220132 is a deficient number, since it is larger than the sum of its proper divisors (213470507228).

221331220132 is a wasteful number, since it uses less digits than its factorization.

221331220132 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4621 (or 4619 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 22.

Adding to 221331220132 its reverse (231022133122), we get a palindrome (452353353254).

The spelling of 221331220132 in words is "two hundred twenty-one billion, three hundred thirty-one million, two hundred twenty thousand, one hundred thirty-two".