213311021312 has 36 divisors (see below), whose sum is σ = 450835205436. Its totient is φ = 100381655040.

The previous prime is 213311021299. The next prime is 213311021327. The reversal of 213311021312 is 213120113312.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 185189072896 + 28121948416 = 430336^2 + 167696^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 24502889 + ... + 24511592.

It is an arithmetic number, because the mean of its divisors is an integer number (12523200151).

Almost surely, 2^213311021312 is an apocalyptic number.

It is an amenable number.

213311021312 is an abundant number, since it is smaller than the sum of its proper divisors (237524184124).

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

213311021312 is an equidigital number, since it uses as much as digits as its factorization.

213311021312 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 49014514 (or 49014500 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 20.

Adding to 213311021312 its reverse (213120113312), we get a palindrome (426431134624).

The spelling of 213311021312 in words is "two hundred thirteen billion, three hundred eleven million, twenty-one thousand, three hundred twelve".