20212213 has 4 divisors (see below), whose sum is σ = 23099680. Its totient is φ = 17324748.

The previous prime is 20212187. The next prime is 20212223. The reversal of 20212213 is 31221202.

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 not a de Polignac number, because 20212213 - 2²¹ = 18115061 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20212193 and 20212202.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20212223) 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, 1443723 + ... + 1443736.

It is an arithmetic number, because the mean of its divisors is an integer number (5774920).

Almost surely, 2^20212213 is an apocalyptic number.

It is an amenable number.

20212213 is a deficient number, since it is larger than the sum of its proper divisors (2887467).

20212213 is an equidigital number, since it uses as much as digits as its factorization.

20212213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2887466.

The product of its (nonzero) digits is 48, while the sum is 13.

The square root of 20212213 is about 4495.7994839628. The cubic root of 20212213 is about 272.3984437657.

Adding to 20212213 its reverse (31221202), we get a palindrome (51433415).

The spelling of 20212213 in words is "twenty million, two hundred twelve thousand, two hundred thirteen".