21322302100 has 36 divisors (see below), whose sum is σ = 50475706848. Its totient is φ = 7753564000.

The previous prime is 21322302077. The next prime is 21322302101. The reversal of 21322302100 is 120322312.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21322302101) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 9690856 + ... + 9693055.

It is an arithmetic number, because the mean of its divisors is an integer number (1402102968).

Almost surely, 2^21322302100 is an apocalyptic number.

21322302100 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21322302100 is an abundant number, since it is smaller than the sum of its proper divisors (29153404748).

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

21322302100 is a wasteful number, since it uses less digits than its factorization.

21322302100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19383936 (or 19383929 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 16.

Adding to 21322302100 its reverse (120322312), we get a palindrome (21442624412).

The spelling of 21322302100 in words is "twenty-one billion, three hundred twenty-two million, three hundred two thousand, one hundred".