1221319022 has 24 divisors (see below), whose sum is σ = 2324813400. Its totient is φ = 475838160.

The previous prime is 1221319013. The next prime is 1221319027. The reversal of 1221319022 is 2209131221.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1221319027) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 565397 + ... + 567552.

It is an arithmetic number, because the mean of its divisors is an integer number (96867225).

Almost surely, 2^1221319022 is an apocalyptic number.

1221319022 is a deficient number, since it is larger than the sum of its proper divisors (1103494378).

1221319022 is a wasteful number, since it uses less digits than its factorization.

1221319022 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1132976 (or 1132969 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 23.

The square root of 1221319022 is about 34947.3750373329. The cubic root of 1221319022 is about 1068.9146773046.

The spelling of 1221319022 in words is "one billion, two hundred twenty-one million, three hundred nineteen thousand, twenty-two".