21132223100 has 36 divisors (see below), whose sum is σ = 45966459000. Its totient is φ = 8432698560.

The previous prime is 21132223087. The next prime is 21132223139. The reversal of 21132223100 is 132223112.

It is a super-2 number, since 2×21132223100² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 210275 + ... + 294074.

Almost surely, 2^21132223100 is an apocalyptic number.

21132223100 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21132223100 is an abundant number, since it is smaller than the sum of its proper divisors (24834235900).

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

21132223100 is a wasteful number, since it uses less digits than its factorization.

21132223100 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 504782 (or 504775 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 17.

Adding to 21132223100 its reverse (132223112), we get a palindrome (21264446212).

The spelling of 21132223100 in words is "twenty-one billion, one hundred thirty-two million, two hundred twenty-three thousand, one hundred".