12221020202 has 4 divisors (see below), whose sum is σ = 18331530306. Its totient is φ = 6110510100.

The previous prime is 12221020187. The next prime is 12221020213. The reversal of 12221020202 is 20202012221.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 20202012221 = 136769 ⋅147709.

It can be written as a sum of positive squares in only one way, i.e., 6519109081 + 5701911121 = 80741^2 + 75511^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3055255049 + ... + 3055255052.

Almost surely, 2^12221020202 is an apocalyptic number.

12221020202 is a deficient number, since it is larger than the sum of its proper divisors (6110510104).

12221020202 is an equidigital number, since it uses as much as digits as its factorization.

12221020202 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6110510103.

The product of its (nonzero) digits is 64, while the sum is 14.

Adding to 12221020202 its reverse (20202012221), we get a palindrome (32423032423).

The spelling of 12221020202 in words is "twelve billion, two hundred twenty-one million, twenty thousand, two hundred two".