1222621144 has 16 divisors (see below), whose sum is σ = 2296163520. Its totient is φ = 610310880.

The previous prime is 1222621123. The next prime is 1222621151. The reversal of 1222621144 is 4411262221.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 119752 + ... + 129559.

It is an arithmetic number, because the mean of its divisors is an integer number (143510220).

Almost surely, 2^1222621144 is an apocalyptic number.

It is an amenable number.

1222621144 is a deficient number, since it is larger than the sum of its proper divisors (1073542376).

1222621144 is a wasteful number, since it uses less digits than its factorization.

1222621144 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 249930 (or 249926 counting only the distinct ones).

The product of its digits is 1536, while the sum is 25.

The square root of 1222621144 is about 34965.9998284047. Note that the first 3 decimals coincide. The cubic root of 1222621144 is about 1069.2944205541.

Adding to 1222621144 its reverse (4411262221), we get a palindrome (5633883365).

The spelling of 1222621144 in words is "one billion, two hundred twenty-two million, six hundred twenty-one thousand, one hundred forty-four".