12121222202 has 4 divisors (see below), whose sum is σ = 18181833306. Its totient is φ = 6060611100.

The previous prime is 12121222199. The next prime is 12121222213. The reversal of 12121222202 is 20222212121.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 20222212121 = 9767 ⋅2070463.

It can be written as a sum of positive squares in only one way, i.e., 12091421521 + 29800681 = 109961^2 + 5459^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3030305549 + ... + 3030305552.

Almost surely, 2^12121222202 is an apocalyptic number.

12121222202 is a deficient number, since it is larger than the sum of its proper divisors (6060611104).

12121222202 is an equidigital number, since it uses as much as digits as its factorization.

12121222202 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6060611103.

The product of its (nonzero) digits is 128, while the sum is 17.

Adding to 12121222202 its reverse (20222212121), we get a palindrome (32343434323).

The spelling of 12121222202 in words is "twelve billion, one hundred twenty-one million, two hundred twenty-two thousand, two hundred two".