1221224444242 has 48 divisors (see below), whose sum is σ = 2025405396000. Its totient is φ = 551825809920.

The previous prime is 1221224444201. The next prime is 1221224444263. The reversal of 1221224444242 is 2424444221221.

It is a junction number, because it is equal to n+sod(n) for n = 1221224444198 and 1221224444207.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 70003573 + ... + 70021015.

It is an arithmetic number, because the mean of its divisors is an integer number (42195945750).

Almost surely, 2^{1221224444242} is an apocalyptic number.

1221224444242 is a deficient number, since it is larger than the sum of its proper divisors (804180951758).

1221224444242 is a wasteful number, since it uses less digits than its factorization.

1221224444242 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19159 (or 19148 counting only the distinct ones).

The product of its digits is 65536, while the sum is 34.

Adding to 1221224444242 its reverse (2424444221221), we get a palindrome (3645668665463).

The spelling of 1221224444242 in words is "one trillion, two hundred twenty-one billion, two hundred twenty-four million, four hundred forty-four thousand, two hundred forty-two".