21222323300 has 36 divisors (see below), whose sum is σ = 46361550900. Its totient is φ = 8431950720.

The previous prime is 21222323293. The next prime is 21222323321. The reversal of 21222323300 is 332322212.

It can be written as a sum of positive squares in 6 ways, for example, as 8705636416 + 12516686884 = 93304^2 + 111878^2 .

It is a Harshad number since it is a multiple of its sum of digits (20).

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 697259 + ... + 727058.

Almost surely, 2^21222323300 is an apocalyptic number.

21222323300 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21222323300 is an abundant number, since it is smaller than the sum of its proper divisors (25139227600).

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

21222323300 is a wasteful number, since it uses less digits than its factorization.

21222323300 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1424480 (or 1424473 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 20.

Adding to 21222323300 its reverse (332322212), we get a palindrome (21554645512).

The spelling of 21222323300 in words is "twenty-one billion, two hundred twenty-two million, three hundred twenty-three thousand, three hundred".