231212223133122 has 384 divisors, whose sum is σ = 621275519176704. Its totient is φ = 56012444928000.

The previous prime is 231212223133069. The next prime is 231212223133153. The reversal of 231212223133122 is 221331322212132.

It is a happy number.

It is a super-2 number, since 2×231212223133122² (a number of 30 digits) contains 22 as substring.

It is a nude number because it is divisible by every one of its digits.

It is a self number, because there is not a number n which added to its sum of digits gives 231212223133122.

It is an unprimeable number.

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 191 ways as a sum of consecutive naturals, for example, 9522339622 + ... + 9522363902.

It is an arithmetic number, because the mean of its divisors is an integer number (1617904997856).

Almost surely, 2^{231212223133122} is an apocalyptic number.

231212223133122 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 231212223133122, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (310637759588352).

231212223133122 is an abundant number, since it is smaller than the sum of its proper divisors (390063296043582).

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

231212223133122 is a wasteful number, since it uses less digits than its factorization.

231212223133122 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26366 (or 26355 counting only the distinct ones).

The product of its digits is 10368, while the sum is 30.

Adding to 231212223133122 its reverse (221331322212132), we get a palindrome (452543545345254).

The spelling of 231212223133122 in words is "two hundred thirty-one trillion, two hundred twelve billion, two hundred twenty-three million, one hundred thirty-three thousand, one hundred twenty-two".