21302210100 has 72 divisors (see below), whose sum is σ = 63137708928. Its totient is φ = 5542035200.

The previous prime is 21302210063. The next prime is 21302210123. The reversal of 21302210100 is 101220312.

It is a Harshad number since it is a multiple of its sum of digits (12).

It is a congruent number.

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, 853644 + ... + 878243.

It is an arithmetic number, because the mean of its divisors is an integer number (876912624).

Almost surely, 2^21302210100 is an apocalyptic number.

21302210100 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21302210100 is an abundant number, since it is smaller than the sum of its proper divisors (41835498828).

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

21302210100 is a wasteful number, since it uses less digits than its factorization.

21302210100 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1731945 (or 1731938 counting only the distinct ones).

The product of its (nonzero) digits is 24, while the sum is 12.

Adding to 21302210100 its reverse (101220312), we get a palindrome (21403430412).

The spelling of 21302210100 in words is "twenty-one billion, three hundred two million, two hundred ten thousand, one hundred".