21223301100 has 36 divisors (see below), whose sum is σ = 61406085384. Its totient is φ = 5659546880.

The previous prime is 21223301087. The next prime is 21223301111. The reversal of 21223301100 is 110332212.

It is a super-2 number, since 2×21223301100² (a number of 21 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a self number, because there is not a number n which added to its sum of digits gives 21223301100.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 35371869 + ... + 35372468.

It is an arithmetic number, because the mean of its divisors is an integer number (1705724594).

Almost surely, 2^21223301100 is an apocalyptic number.

21223301100 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21223301100 is an abundant number, since it is smaller than the sum of its proper divisors (40182784284).

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

21223301100 is a wasteful number, since it uses less digits than its factorization.

21223301100 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 70744354 (or 70744347 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 15.

Adding to 21223301100 its reverse (110332212), we get a palindrome (21333633312).

The spelling of 21223301100 in words is "twenty-one billion, two hundred twenty-three million, three hundred one thousand, one hundred".