213311431212 has 48 divisors (see below), whose sum is σ = 543111004800. Its totient is φ = 64623583360.

The previous prime is 213311431211. The next prime is 213311431247. The reversal of 213311431212 is 212134113312.

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

It is not an unprimeable number, because it can be changed into a prime (213311431211) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 329464 + ... + 731552.

It is an arithmetic number, because the mean of its divisors is an integer number (11314812600).

Almost surely, 2^213311431212 is an apocalyptic number.

213311431212 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

213311431212 is an abundant number, since it is smaller than the sum of its proper divisors (329799573588).

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

213311431212 is a wasteful number, since it uses less digits than its factorization.

213311431212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 406126 (or 406124 counting only the distinct ones).

The product of its digits is 864, while the sum is 24.

Adding to 213311431212 its reverse (212134113312), we get a palindrome (425445544524).

The spelling of 213311431212 in words is "two hundred thirteen billion, three hundred eleven million, four hundred thirty-one thousand, two hundred twelve".