21133133032 has 96 divisors (see below), whose sum is σ = 44360820000. Its totient is φ = 9429171840.

The previous prime is 21133133017. The next prime is 21133133053. The reversal of 21133133032 is 23033133112.

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

It is a junction number, because it is equal to n+sod(n) for n = 21133132994 and 21133133012.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 32362818 + ... + 32363470.

It is an arithmetic number, because the mean of its divisors is an integer number (462091875).

Almost surely, 2^21133133032 is an apocalyptic number.

21133133032 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 21133133032, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (22180410000).

21133133032 is an abundant number, since it is smaller than the sum of its proper divisors (23227686968).

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

21133133032 is a wasteful number, since it uses less digits than its factorization.

21133133032 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1247 (or 1232 counting only the distinct ones).

The product of its (nonzero) digits is 972, while the sum is 22.

Adding to 21133133032 its reverse (23033133112), we get a palindrome (44166266144).

The spelling of 21133133032 in words is "twenty-one billion, one hundred thirty-three million, one hundred thirty-three thousand, thirty-two".