21312022322220 has 192 divisors, whose sum is σ = 71791017984000. Its totient is φ = 4614731447040.

The previous prime is 21312022322203. The next prime is 21312022322221. The reversal of 21312022322220 is 2222322021312.

It is not an unprimeable number, because it can be changed into a prime (21312022322221) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 246626581 + ... + 246712979.

It is an arithmetic number, because the mean of its divisors is an integer number (373911552000).

Almost surely, 2^{21312022322220} is an apocalyptic number.

21312022322220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21312022322220 is an abundant number, since it is smaller than the sum of its proper divisors (50478995661780).

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

21312022322220 is a wasteful number, since it uses less digits than its factorization.

21312022322220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 117348 (or 117346 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 24.

Adding to 21312022322220 its reverse (2222322021312), we get a palindrome (23534344343532).

The spelling of 21312022322220 in words is "twenty-one trillion, three hundred twelve billion, twenty-two million, three hundred twenty-two thousand, two hundred twenty".