21310222200 has 96 divisors (see below), whose sum is σ = 68933980800. Its totient is φ = 5435647360.

The previous prime is 21310222169. The next prime is 21310222229. The reversal of 21310222200 is 222201312.

It is a happy number.

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 21310222200.

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, 758310 + ... + 785909.

It is an arithmetic number, because the mean of its divisors is an integer number (718062300).

Almost surely, 2^21310222200 is an apocalyptic number.

21310222200 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21310222200 is an abundant number, since it is smaller than the sum of its proper divisors (47623758600).

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

21310222200 is a wasteful number, since it uses less digits than its factorization.

21310222200 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1544261 (or 1544252 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 15.

Adding to 21310222200 its reverse (222201312), we get a palindrome (21532423512).

The spelling of 21310222200 in words is "twenty-one billion, three hundred ten million, two hundred twenty-two thousand, two hundred".