1222144140 has 48 divisors (see below), whose sum is σ = 3910862592. Its totient is φ = 279347136.

The previous prime is 1222144111. The next prime is 1222144153. The reversal of 1222144140 is 414412221.

It is a Harshad number since it is a multiple of its sum of digits (21).

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, 1454514 + ... + 1455353.

It is an arithmetic number, because the mean of its divisors is an integer number (81476304).

Almost surely, 2^1222144140 is an apocalyptic number.

1222144140 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1222144140 is an abundant number, since it is smaller than the sum of its proper divisors (2688718452).

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

1222144140 is a wasteful number, since it uses less digits than its factorization.

1222144140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2909886 (or 2909884 counting only the distinct ones).

The product of its (nonzero) digits is 512, while the sum is 21.

The square root of 1222144140 is about 34959.1781940022. The cubic root of 1222144140 is about 1069.1553412039.

Adding to 1222144140 its reverse (414412221), we get a palindrome (1636556361).

The spelling of 1222144140 in words is "one billion, two hundred twenty-two million, one hundred forty-four thousand, one hundred forty".