20311331031222 has 64 divisors (see below), whose sum is σ = 51215496998400. Its totient is φ = 5216393191680.

The previous prime is 20311331031221. The next prime is 20311331031247. The reversal of 20311331031222 is 22213013311302.

It is a junction number, because it is equal to n+sod(n) for n = 20311331031192 and 20311331031201.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20311331031221) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 246947197 + ... + 247029432.

It is an arithmetic number, because the mean of its divisors is an integer number (800242140600).

Almost surely, 2^{20311331031222} is an apocalyptic number.

20311331031222 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

20311331031222 is an abundant number, since it is smaller than the sum of its proper divisors (30904165967178).

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

20311331031222 is a wasteful number, since it uses less digits than its factorization.

20311331031222 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 493976741.

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

Adding to 20311331031222 its reverse (22213013311302), we get a palindrome (42524344342524).

The spelling of 20311331031222 in words is "twenty trillion, three hundred eleven billion, three hundred thirty-one million, thirty-one thousand, two hundred twenty-two".