21131133232 has 20 divisors (see below), whose sum is σ = 44663531976. Its totient is φ = 9605060480.

The previous prime is 21131133223. The next prime is 21131133269. The reversal of 21131133232 is 23233113112.

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

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 60031453 + ... + 60031804.

Almost surely, 2^21131133232 is an apocalyptic number.

21131133232 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

21131133232 is an abundant number, since it is smaller than the sum of its proper divisors (23532398744).

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

21131133232 is a wasteful number, since it uses less digits than its factorization.

21131133232 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 120063276 (or 120063270 counting only the distinct ones).

The product of its digits is 648, while the sum is 22.

Adding to 21131133232 its reverse (23233113112), we get a palindrome (44364246344).

The spelling of 21131133232 in words is "twenty-one billion, one hundred thirty-one million, one hundred thirty-three thousand, two hundred thirty-two".