21233323100 has 36 divisors (see below), whose sum is σ = 50265069288. Its totient is φ = 7721208000.

The previous prime is 21233323087. The next prime is 21233323127. The reversal of 21233323100 is 132333212.

It is a super-2 number, since 2×21233323100² (a number of 21 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 9650411 + ... + 9652610.

Almost surely, 2^21233323100 is an apocalyptic number.

21233323100 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21233323100 is an abundant number, since it is smaller than the sum of its proper divisors (29031746188).

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

21233323100 is a wasteful number, since it uses less digits than its factorization.

21233323100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19303046 (or 19303039 counting only the distinct ones).

The product of its (nonzero) digits is 648, while the sum is 20.

Adding to 21233323100 its reverse (132333212), we get a palindrome (21365656312).

The spelling of 21233323100 in words is "twenty-one billion, two hundred thirty-three million, three hundred twenty-three thousand, one hundred".