1221442440222 has 32 divisors (see below), whose sum is σ = 2494951828992. Its totient is φ = 398470285184.

The previous prime is 1221442440203. The next prime is 1221442440319. The reversal of 1221442440222 is 2220442441221.

It is a self number, because there is not a number n which added to its sum of digits gives 1221442440222.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 9960493 + ... + 10082375.

It is an arithmetic number, because the mean of its divisors is an integer number (77967244656).

Almost surely, 2^{1221442440222} is an apocalyptic number.

1221442440222 is an abundant number, since it is smaller than the sum of its proper divisors (1273509388770).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1221442440222 is a wasteful number, since it uses less digits than its factorization.

1221442440222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 157472.

The product of its (nonzero) digits is 16384, while the sum is 30.

Adding to 1221442440222 its reverse (2220442441221), we get a palindrome (3441884881443).

Subtracting 1221442440222 from its reverse (2220442441221), we obtain a palindrome (999000000999).

The spelling of 1221442440222 in words is "one trillion, two hundred twenty-one billion, four hundred forty-two million, four hundred forty thousand, two hundred twenty-two".