221331123132 has 48 divisors (see below), whose sum is σ = 596301054720. Its totient is φ = 62585528832.

The previous prime is 221331123047. The next prime is 221331123137. The reversal of 221331123132 is 231321133122.

It is a nude number because it is divisible by every one of its digits.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221331123137) 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, 13573782 + ... + 13590077.

It is an arithmetic number, because the mean of its divisors is an integer number (12422938640).

Almost surely, 2^221331123132 is an apocalyptic number.

It is an amenable number.

221331123132 is an abundant number, since it is smaller than the sum of its proper divisors (374969931588).

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

221331123132 is a wasteful number, since it uses less digits than its factorization.

221331123132 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27163970 (or 27163968 counting only the distinct ones).

The product of its digits is 1296, while the sum is 24.

Adding to 221331123132 its reverse (231321133122), we get a palindrome (452652256254).

The spelling of 221331123132 in words is "two hundred twenty-one billion, three hundred thirty-one million, one hundred twenty-three thousand, one hundred thirty-two".