21312222032300 has 144 divisors (see below), whose sum is σ = 48511415070720. Its totient is φ = 8116954272000.

The previous prime is 21312222032291. The next prime is 21312222032323. The reversal of 21312222032300 is 323022221312.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 107089286 + ... + 107288114.

It is an arithmetic number, because the mean of its divisors is an integer number (336884826880).

Almost surely, 2^{21312222032300} is an apocalyptic number.

21312222032300 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 21312222032300, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (24255707535360).

21312222032300 is an abundant number, since it is smaller than the sum of its proper divisors (27199193038420).

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

21312222032300 is a wasteful number, since it uses less digits than its factorization.

21312222032300 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 199432 (or 199425 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 23.

Adding to 21312222032300 its reverse (323022221312), we get a palindrome (21635244253612).

The spelling of 21312222032300 in words is "twenty-one trillion, three hundred twelve billion, two hundred twenty-two million, thirty-two thousand, three hundred".