212211302231213 has 4 divisors (see below), whose sum is σ = 212212316732988. Its totient is φ = 212210287729440.

The previous prime is 212211302231207. The next prime is 212211302231351. The reversal of 212211302231213 is 312132203112212.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 60483548831689 + 151727753399524 = 7777117^2 + 12317782^2 .

It is a cyclic number.

It is not a de Polignac number, because 212211302231213 - 2⁸ = 212211302230957 is a prime.

It is a super-2 number, since 2×212211302231213² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (212211302231713) 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, 506937056 + ... + 507355497.

It is an arithmetic number, because the mean of its divisors is an integer number (53053079183247).

Almost surely, 2^{212211302231213} is an apocalyptic number.

It is an amenable number.

212211302231213 is a deficient number, since it is larger than the sum of its proper divisors (1014501775).

212211302231213 is a wasteful number, since it uses less digits than its factorization.

212211302231213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1014501774.

The product of its (nonzero) digits is 1728, while the sum is 26.

Adding to 212211302231213 its reverse (312132203112212), we get a palindrome (524343505343425).

The spelling of 212211302231213 in words is "two hundred twelve trillion, two hundred eleven billion, three hundred two million, two hundred thirty-one thousand, two hundred thirteen".