231220212432012 has 120 divisors (see below), whose sum is σ = 609412613313504. Its totient is φ = 76442311450368.

The previous prime is 231220212431977. The next prime is 231220212432067. The reversal of 231220212432012 is 210234212022132.

231220212432012 is a `hidden beast` number, since 2 + 3 + 1 + 2 + 2 + 0 + 212 + 432 + 0 + 12 = 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 39 ways as a sum of consecutive naturals, for example, 47249673 + ... + 51913119.

Almost surely, 2^{231220212432012} is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 231220212432012, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (304706306656752).

231220212432012 is an abundant number, since it is smaller than the sum of its proper divisors (378192400881492).

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

231220212432012 is a wasteful number, since it uses less digits than its factorization.

231220212432012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4664717 (or 4664706 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 27.

Adding to 231220212432012 its reverse (210234212022132), we get a palindrome (441454424454144).

The spelling of 231220212432012 in words is "two hundred thirty-one trillion, two hundred twenty billion, two hundred twelve million, four hundred thirty-two thousand, twelve".