212051225213 has 4 divisors (see below), whose sum is σ = 212052666300. Its totient is φ = 212049784128.

The previous prime is 212051225203. The next prime is 212051225227. The reversal of 212051225213 is 312522150212.

It is a happy number.

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 39129982969 + 172921242244 = 197813^2 + 415838^2 .

It is a cyclic number.

It is not a de Polignac number, because 212051225213 - 2³⁶ = 143331748477 is a prime.

It is a super-2 number, since 2×212051225213² (a number of 23 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 (212051225203) 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, 471020 + ... + 803717.

It is an arithmetic number, because the mean of its divisors is an integer number (53013166575).

Almost surely, 2^212051225213 is an apocalyptic number.

It is an amenable number.

212051225213 is a deficient number, since it is larger than the sum of its proper divisors (1441087).

212051225213 is a wasteful number, since it uses less digits than its factorization.

212051225213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1441086.

The product of its (nonzero) digits is 2400, while the sum is 26.

Adding to 212051225213 its reverse (312522150212), we get a palindrome (524573375425).

The spelling of 212051225213 in words is "two hundred twelve billion, fifty-one million, two hundred twenty-five thousand, two hundred thirteen".