12121213222 has 4 divisors (see below), whose sum is σ = 18181819836. Its totient is φ = 6060606610.

The previous prime is 12121213211. The next prime is 12121213253. The reversal of 12121213222 is 22231212121.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 22231212121 = 2131 ⋅10432291.

It is a self number, because there is not a number n which added to its sum of digits gives 12121213222.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3030303304 + ... + 3030303307.

It is an arithmetic number, because the mean of its divisors is an integer number (4545454959).

Almost surely, 2^12121213222 is an apocalyptic number.

12121213222 is a deficient number, since it is larger than the sum of its proper divisors (6060606614).

12121213222 is an equidigital number, since it uses as much as digits as its factorization.

12121213222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6060606613.

The product of its digits is 192, while the sum is 19.

Adding to 12121213222 its reverse (22231212121), we get a palindrome (34352425343).

The spelling of 12121213222 in words is "twelve billion, one hundred twenty-one million, two hundred thirteen thousand, two hundred twenty-two".