23211310331220 has 384 divisors, whose sum is σ = 73410168803328. Its totient is φ = 5432284569600.

The previous prime is 23211310331179. The next prime is 23211310331233. The reversal of 23211310331220 is 2213301311232.

It is a super-2 number, since 2×23211310331220² (a number of 28 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 439473534 + ... + 439526346.

It is an arithmetic number, because the mean of its divisors is an integer number (191172314592).

Almost surely, 2^{23211310331220} is an apocalyptic number.

23211310331220 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 23211310331220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (36705084401664).

23211310331220 is an abundant number, since it is smaller than the sum of its proper divisors (50198858472108).

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

23211310331220 is a wasteful number, since it uses less digits than its factorization.

23211310331220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 53103 (or 53101 counting only the distinct ones).

The product of its (nonzero) digits is 1296, while the sum is 24.

Adding to 23211310331220 its reverse (2213301311232), we get a palindrome (25424611642452).

The spelling of 23211310331220 in words is "twenty-three trillion, two hundred eleven billion, three hundred ten million, three hundred thirty-one thousand, two hundred twenty".