12221122121122 has 4 divisors (see below), whose sum is σ = 18331683181686. Its totient is φ = 6110561060560.

The previous prime is 12221122121119. The next prime is 12221122121171. The reversal of 12221122121122 is 22112122112221.

12221122121122 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 10537743023721 + 1683379097401 = 3246189^2 + 1297451^2 .

It is a nude number because it is divisible by every one of its digits.

It is a junction number, because it is equal to n+sod(n) for n = 12221122121093 and 12221122121102.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3055280530279 + ... + 3055280530282.

Almost surely, 2^{12221122121122} is an apocalyptic number.

12221122121122 is a deficient number, since it is larger than the sum of its proper divisors (6110561060564).

12221122121122 is an equidigital number, since it uses as much as digits as its factorization.

12221122121122 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6110561060563.

The product of its digits is 256, while the sum is 22.

Adding to 12221122121122 its reverse (22112122112221), we get a palindrome (34333244233343).

The spelling of 12221122121122 in words is "twelve trillion, two hundred twenty-one billion, one hundred twenty-two million, one hundred twenty-one thousand, one hundred twenty-two".