122219813 has 2 divisors, whose sum is σ = 122219814. Its totient is φ = 122219812.

The previous prime is 122219809. The next prime is 122219821. The reversal of 122219813 is 318912221.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 116683204 + 5536609 = 10802^2 + 2353^2 .

It is a cyclic number.

It is not a de Polignac number, because 122219813 - 2² = 122219809 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (122219413) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 61109906 + 61109907.

It is an arithmetic number, because the mean of its divisors is an integer number (61109907).

Almost surely, 2^122219813 is an apocalyptic number.

It is an amenable number.

122219813 is a deficient number, since it is larger than the sum of its proper divisors (1).

122219813 is an equidigital number, since it uses as much as digits as its factorization.

122219813 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1728, while the sum is 29.

The square root of 122219813 is about 11055.3070061396. The cubic root of 122219813 is about 496.2652568449.

The spelling of 122219813 in words is "one hundred twenty-two million, two hundred nineteen thousand, eight hundred thirteen".