12220122021209 has 4 divisors (see below), whose sum is σ = 12227443845540. Its totient is φ = 12212800196880.

The previous prime is 12220122021203. The next prime is 12220122021251. The reversal of 12220122021209 is 90212022102221.

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 5203964688400 + 7016157332809 = 2281220^2 + 2648803^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12220122021209 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12220122021203) 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, 3660909662 + ... + 3660912999.

It is an arithmetic number, because the mean of its divisors is an integer number (3056860961385).

Almost surely, 2^{12220122021209} is an apocalyptic number.

It is an amenable number.

12220122021209 is a deficient number, since it is larger than the sum of its proper divisors (7321824331).

12220122021209 is an equidigital number, since it uses as much as digits as its factorization.

12220122021209 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7321824330.

The product of its (nonzero) digits is 1152, while the sum is 26.

The spelling of 12220122021209 in words is "twelve trillion, two hundred twenty billion, one hundred twenty-two million, twenty-one thousand, two hundred nine".