1212112133213 has 16 divisors (see below), whose sum is σ = 1268605497600. Its totient is φ = 1155939941376.

The previous prime is 1212112133209. The next prime is 1212112133233. The reversal of 1212112133213 is 3123312112121.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 1212112133213 - 2² = 1212112133209 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (23).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1212112133233) 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, 10519688 + ... + 10634286.

It is an arithmetic number, because the mean of its divisors is an integer number (79287843600).

Almost surely, 2^{1212112133213} is an apocalyptic number.

It is an amenable number.

1212112133213 is a deficient number, since it is larger than the sum of its proper divisors (56493364387).

1212112133213 is a wasteful number, since it uses less digits than its factorization.

1212112133213 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 115996.

The product of its digits is 432, while the sum is 23.

Adding to 1212112133213 its reverse (3123312112121), we get a palindrome (4335424245334).

The spelling of 1212112133213 in words is "one trillion, two hundred twelve billion, one hundred twelve million, one hundred thirty-three thousand, two hundred thirteen".