122215213 has 4 divisors (see below), whose sum is σ = 123889468. Its totient is φ = 120540960.

The previous prime is 122215199. The next prime is 122215231. The reversal of 122215213 is 312512221.

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 31832164 + 90383049 = 5642^2 + 9507^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-122215213 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (122215273) 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, 837018 + ... + 837163.

It is an arithmetic number, because the mean of its divisors is an integer number (30972367).

Almost surely, 2^122215213 is an apocalyptic number.

It is an amenable number.

122215213 is a deficient number, since it is larger than the sum of its proper divisors (1674255).

122215213 is an equidigital number, since it uses as much as digits as its factorization.

122215213 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1674254.

The product of its digits is 240, while the sum is 19.

The square root of 122215213 is about 11055.0989593038. The cubic root of 122215213 is about 496.2590307709.

Adding to 122215213 its reverse (312512221), we get a palindrome (434727434).

The spelling of 122215213 in words is "one hundred twenty-two million, two hundred fifteen thousand, two hundred thirteen".