12212119978 has 8 divisors (see below), whose sum is σ = 18321312420. Its totient is φ = 6105015840.

The previous prime is 12212119973. The next prime is 12212119981. The reversal of 12212119978 is 87991121221.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 9736360929 + 2475759049 = 98673^2 + 49757^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (12212119973) by changing a digit.

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, 507373 + ... + 530896.

Almost surely, 2^12212119978 is an apocalyptic number.

12212119978 is a deficient number, since it is larger than the sum of its proper divisors (6109192442).

12212119978 is a wasteful number, since it uses less digits than its factorization.

12212119978 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1044152.

The product of its digits is 36288, while the sum is 43.

The spelling of 12212119978 in words is "twelve billion, two hundred twelve million, one hundred nineteen thousand, nine hundred seventy-eight".