12101221222 has 4 divisors (see below), whose sum is σ = 18151831836. Its totient is φ = 6050610610.

The previous prime is 12101221213. The next prime is 12101221229. The reversal of 12101221222 is 22212210121.

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: 22212210121 = 859 ⋅25858219.

It is a junction number, because it is equal to n+sod(n) for n = 12101221196 and 12101221205.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12101221229) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3025305304 + ... + 3025305307.

It is an arithmetic number, because the mean of its divisors is an integer number (4537957959).

Almost surely, 2^12101221222 is an apocalyptic number.

12101221222 is a deficient number, since it is larger than the sum of its proper divisors (6050610614).

12101221222 is an equidigital number, since it uses as much as digits as its factorization.

12101221222 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6050610613.

The product of its (nonzero) digits is 64, while the sum is 16.

Adding to 12101221222 its reverse (22212210121), we get a palindrome (34313431343).

The spelling of 12101221222 in words is "twelve billion, one hundred one million, two hundred twenty-one thousand, two hundred twenty-two".