21233313132 has 12 divisors (see below), whose sum is σ = 49544397336. Its totient is φ = 7077771040.

The previous prime is 21233313131. The next prime is 21233313221. The reversal of 21233313132 is 23131333212.

It is a tau number, because it is divible by the number of its divisors (12).

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

It is not an unprimeable number, because it can be changed into a prime (21233313131) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 884721369 + ... + 884721392.

It is an arithmetic number, because the mean of its divisors is an integer number (4128699778).

Almost surely, 2^21233313132 is an apocalyptic number.

It is an amenable number.

21233313132 is an abundant number, since it is smaller than the sum of its proper divisors (28311084204).

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

21233313132 is a wasteful number, since it uses less digits than its factorization.

21233313132 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1769442768 (or 1769442766 counting only the distinct ones).

The product of its digits is 1944, while the sum is 24.

Adding to 21233313132 its reverse (23131333212), we get a palindrome (44364646344).

The spelling of 21233313132 in words is "twenty-one billion, two hundred thirty-three million, three hundred thirteen thousand, one hundred thirty-two".