220122209978 has 24 divisors (see below), whose sum is σ = 365155389984. Its totient is φ = 99441694440.

The previous prime is 220122209963. The next prime is 220122210017. The reversal of 220122209978 is 879902221022.

220122209978 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Smith number, since the sum of its digits (44) coincides with the sum of the digits of its prime factors.

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 11 ways as a sum of consecutive naturals, for example, 2750726 + ... + 2829617.

It is an arithmetic number, because the mean of its divisors is an integer number (15214807916).

Almost surely, 2^220122209978 is an apocalyptic number.

220122209978 is a deficient number, since it is larger than the sum of its proper divisors (145033180006).

220122209978 is a wasteful number, since it uses less digits than its factorization.

220122209978 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5580530 (or 5580519 counting only the distinct ones).

The product of its (nonzero) digits is 145152, while the sum is 44.

The spelling of 220122209978 in words is "two hundred twenty billion, one hundred twenty-two million, two hundred nine thousand, nine hundred seventy-eight".