231220212431424 has 28 divisors (see below), whose sum is σ = 611770145391984. Its totient is φ = 77073404143744.

The previous prime is 231220212431387. The next prime is 231220212431459. The reversal of 231220212431424 is 424134212022132.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 602135969682 + ... + 602135970065.

Almost surely, 2^{231220212431424} is an apocalyptic number.

231220212431424 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

231220212431424 is an abundant number, since it is smaller than the sum of its proper divisors (380549932960560).

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

231220212431424 is a wasteful number, since it uses less digits than its factorization.

231220212431424 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1204271939762 (or 1204271939752 counting only the distinct ones).

The product of its (nonzero) digits is 36864, while the sum is 33.

Adding to 231220212431424 its reverse (424134212022132), we get a palindrome (655354424453556).

The spelling of 231220212431424 in words is "two hundred thirty-one trillion, two hundred twenty billion, two hundred twelve million, four hundred thirty-one thousand, four hundred twenty-four".