212112121211213 has 4 divisors (see below), whose sum is σ = 212112263505408. Its totient is φ = 212111978917020.

The previous prime is 212112121211183. The next prime is 212112121211233. The reversal of 212112121211213 is 312112121211212.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 212112121211213 - 2⁶ = 212112121211149 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (212112121211233) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 68887181 + ... + 71900402.

It is an arithmetic number, because the mean of its divisors is an integer number (53028065876352).

Almost surely, 2^{212112121211213} is an apocalyptic number.

It is an amenable number.

212112121211213 is a deficient number, since it is larger than the sum of its proper divisors (142294195).

212112121211213 is a wasteful number, since it uses less digits than its factorization.

212112121211213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 142294194.

The product of its digits is 192, while the sum is 23.

Adding to 212112121211213 its reverse (312112121211212), we get a palindrome (524224242422425).

Subtracting 212112121211213 from its reverse (312112121211212), we obtain a palindrome (99999999999999).

The spelling of 212112121211213 in words is "two hundred twelve trillion, one hundred twelve billion, one hundred twenty-one million, two hundred eleven thousand, two hundred thirteen".