213113211212 has 12 divisors (see below), whose sum is σ = 406852494216. Its totient is φ = 96869641440.

The previous prime is 213113211211. The next prime is 213113211251. The reversal of 213113211212 is 212112311312.

It is not an unprimeable number, because it can be changed into a prime (213113211211) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2421740993 + ... + 2421741080.

It is an arithmetic number, because the mean of its divisors is an integer number (33904374518).

Almost surely, 2^213113211212 is an apocalyptic number.

213113211212 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

213113211212 is a deficient number, since it is larger than the sum of its proper divisors (193739283004).

213113211212 is a wasteful number, since it uses less digits than its factorization.

213113211212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4843482088 (or 4843482086 counting only the distinct ones).

The product of its digits is 144, while the sum is 20.

Adding to 213113211212 its reverse (212112311312), we get a palindrome (425225522524).

The spelling of 213113211212 in words is "two hundred thirteen billion, one hundred thirteen million, two hundred eleven thousand, two hundred twelve".