23121132 has 24 divisors (see below), whose sum is σ = 54558000. Its totient is φ = 7620096.

The previous prime is 23121127. The next prime is 23121181. The reversal of 23121132 is 23112132.

It is a super-2 number, since 2×23121132² = 1069173489922848, which contains 22 as substring.

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

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9757 + ... + 11892.

It is an arithmetic number, because the mean of its divisors is an integer number (2273250).

Almost surely, 2^23121132 is an apocalyptic number.

It is an amenable number.

23121132 is an abundant number, since it is smaller than the sum of its proper divisors (31436868).

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

23121132 is a wasteful number, since it uses less digits than its factorization.

23121132 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21745 (or 21743 counting only the distinct ones).

The product of its digits is 72, while the sum is 15.

The square root of 23121132 is about 4808.4438231095. The cubic root of 23121132 is about 284.8850752393.

Adding to 23121132 its reverse (23112132), we get a palindrome (46233264).

The spelling of 23121132 in words is "twenty-three million, one hundred twenty-one thousand, one hundred thirty-two".