1222140442400 has 72 divisors (see below), whose sum is σ = 2984295125700. Its totient is φ = 488734146560.

The previous prime is 1222140442381. The next prime is 1222140442429. The reversal of 1222140442400 is 42440412221.

It is a happy number.

It can be written as a sum of positive squares in 6 ways, for example, as 481652656144 + 740487786256 = 694012^2 + 860516^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 1222140442400.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3050552 + ... + 3427848.

Almost surely, 2^{1222140442400} is an apocalyptic number.

1222140442400 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1222140442400 is an abundant number, since it is smaller than the sum of its proper divisors (1762154683300).

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

1222140442400 is a wasteful number, since it uses less digits than its factorization.

1222140442400 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 381366 (or 381353 counting only the distinct ones).

The product of its (nonzero) digits is 4096, while the sum is 26.

Adding to 1222140442400 its reverse (42440412221), we get a palindrome (1264580854621).

The spelling of 1222140442400 in words is "one trillion, two hundred twenty-two billion, one hundred forty million, four hundred forty-two thousand, four hundred".