1222142504440 has 128 divisors (see below), whose sum is σ = 3233377828800. Its totient is φ = 409871646720.

The previous prime is 1222142504419. The next prime is 1222142504441. The reversal of 1222142504440 is 444052412221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1222142504441) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 6502506 + ... + 6687814.

Almost surely, 2^{1222142504440} is an apocalyptic number.

1222142504440 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1222142504440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1616688914400).

1222142504440 is an abundant number, since it is smaller than the sum of its proper divisors (2011235324360).

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

1222142504440 is a wasteful number, since it uses less digits than its factorization.

1222142504440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 186497 (or 186493 counting only the distinct ones).

The product of its (nonzero) digits is 20480, while the sum is 31.

Adding to 1222142504440 its reverse (444052412221), we get a palindrome (1666194916661).

The spelling of 1222142504440 in words is "one trillion, two hundred twenty-two billion, one hundred forty-two million, five hundred four thousand, four hundred forty".