20311213323222 has 192 divisors, whose sum is σ = 48101065272000. Its totient is φ = 6169687501824.

The previous prime is 20311213323217. The next prime is 20311213323257. The reversal of 20311213323222 is 22232331211302.

20311213323222 is a `hidden beast` number, since 2 + 0 + 3 + 1 + 1 + 2 + 1 + 332 + 322 + 2 = 666.

It is a super-2 number, since 2×20311213323222² (a number of 27 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 95 ways as a sum of consecutive naturals, for example, 3908254728 + ... + 3908259924.

It is an arithmetic number, because the mean of its divisors is an integer number (250526381625).

Almost surely, 2^{20311213323222} is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20311213323222, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (24050532636000).

20311213323222 is an abundant number, since it is smaller than the sum of its proper divisors (27789851948778).

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

20311213323222 is a wasteful number, since it uses less digits than its factorization.

20311213323222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6655 (or 6652 counting only the distinct ones).

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

Adding to 20311213323222 its reverse (22232331211302), we get a palindrome (42543544534524).

The spelling of 20311213323222 in words is "twenty trillion, three hundred eleven billion, two hundred thirteen million, three hundred twenty-three thousand, two hundred twenty-two".