1122221144 has 32 divisors (see below), whose sum is σ = 2299631040. Its totient is φ = 509172000.

The previous prime is 1122221143. The next prime is 1122221159. The reversal of 1122221144 is 4411222211.

It is a nude number because it is divisible by every one of its digits.

It is a zygodrome in base 10.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1122221143) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 38219 + ... + 60869.

It is an arithmetic number, because the mean of its divisors is an integer number (71863470).

Almost surely, 2^1122221144 is an apocalyptic number.

It is an amenable number.

1122221144 is an abundant number, since it is smaller than the sum of its proper divisors (1177409896).

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

1122221144 is a wasteful number, since it uses less digits than its factorization.

1122221144 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23231 (or 23227 counting only the distinct ones).

The product of its digits is 256, while the sum is 20.

The square root of 1122221144 is about 33499.5693106643. The cubic root of 1122221144 is about 1039.1848716429.

Adding to 1122221144 its reverse (4411222211), we get a palindrome (5533443355).

The spelling of 1122221144 in words is "one billion, one hundred twenty-two million, two hundred twenty-one thousand, one hundred forty-four".