122021213 has 2 divisors, whose sum is σ = 122021214. Its totient is φ = 122021212.

The previous prime is 122021201. The next prime is 122021243. The reversal of 122021213 is 312120221.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 112423609 + 9597604 = 10603^2 + 3098^2 .

It is a cyclic number.

It is not a de Polignac number, because 122021213 - 2⁴ = 122021197 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (122021243) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 61010606 + 61010607.

It is an arithmetic number, because the mean of its divisors is an integer number (61010607).

Almost surely, 2^122021213 is an apocalyptic number.

It is an amenable number.

122021213 is a deficient number, since it is larger than the sum of its proper divisors (1).

122021213 is an equidigital number, since it uses as much as digits as its factorization.

122021213 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 48, while the sum is 14.

The square root of 122021213 is about 11046.3212428392. The cubic root of 122021213 is about 495.9963105106.

Adding to 122021213 its reverse (312120221), we get a palindrome (434141434).

The spelling of 122021213 in words is "one hundred twenty-two million, twenty-one thousand, two hundred thirteen".