212212022213 has 4 divisors (see below), whose sum is σ = 212213965548. Its totient is φ = 212210078880.

The previous prime is 212212022171. The next prime is 212212022233. The reversal of 212212022213 is 312220212212.

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 55092539524 + 157119482689 = 234718^2 + 396383^2 .

It is a cyclic number.

It is not a de Polignac number, because 212212022213 - 2²⁶ = 212144913349 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (212212022233) 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, 797456 + ... + 1029737.

It is an arithmetic number, because the mean of its divisors is an integer number (53053491387).

Almost surely, 2^212212022213 is an apocalyptic number.

It is an amenable number.

212212022213 is a deficient number, since it is larger than the sum of its proper divisors (1943335).

212212022213 is a wasteful number, since it uses less digits than its factorization.

212212022213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1943334.

The product of its (nonzero) digits is 384, while the sum is 20.

Adding to 212212022213 its reverse (312220212212), we get a palindrome (524432234425).

The spelling of 212212022213 in words is "two hundred twelve billion, two hundred twelve million, twenty-two thousand, two hundred thirteen".