1222119978 has 16 divisors (see below), whose sum is σ = 2444613600. Its totient is φ = 407311056.

The previous prime is 1222119961. The next prime is 1222119979. The reversal of 1222119978 is 8799112221.

It is not an unprimeable number, because it can be changed into a prime (1222119979) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 45201 + ... + 66987.

It is an arithmetic number, because the mean of its divisors is an integer number (152788350).

Almost surely, 2^1222119978 is an apocalyptic number.

1222119978 is an abundant number, since it is smaller than the sum of its proper divisors (1222493622).

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

1222119978 is a wasteful number, since it uses less digits than its factorization.

1222119978 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31141.

The product of its digits is 36288, while the sum is 42.

The square root of 1222119978 is about 34958.8326178092. The cubic root of 1222119978 is about 1069.1482953624.

The spelling of 1222119978 in words is "one billion, two hundred twenty-two million, one hundred nineteen thousand, nine hundred seventy-eight".