21313212233220 has 192 divisors, whose sum is σ = 72105749372160. Its totient is φ = 5204625352704.

The previous prime is 21313212233219. The next prime is 21313212233363. The reversal of 21313212233220 is 2233221231312.

21313212233220 is a `hidden beast` number, since 2 + 1 + 3 + 1 + 321 + 2 + 2 + 332 + 2 + 0 = 666.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 31034674 + ... + 31713993.

It is an arithmetic number, because the mean of its divisors is an integer number (375550777980).

Almost surely, 2^{21313212233220} is an apocalyptic number.

21313212233220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21313212233220 is an abundant number, since it is smaller than the sum of its proper divisors (50792537138940).

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

21313212233220 is a wasteful number, since it uses less digits than its factorization.

21313212233220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 62748739 (or 62748731 counting only the distinct ones).

The product of its (nonzero) digits is 5184, while the sum is 27.

Adding to 21313212233220 its reverse (2233221231312), we get a palindrome (23546433464532).

The spelling of 21313212233220 in words is "twenty-one trillion, three hundred thirteen billion, two hundred twelve million, two hundred thirty-three thousand, two hundred twenty".