111222321009978 has 16 divisors (see below), whose sum is σ = 223004955984480. Its totient is φ = 36980721342576.

The previous prime is 111222321009977. The next prime is 111222321010049. The reversal of 111222321009978 is 879900123222111.

It is not an unprimeable number, because it can be changed into a prime (111222321009973) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 23346412608 + ... + 23346417371.

It is an arithmetic number, because the mean of its divisors is an integer number (13937809749030).

Almost surely, 2^{111222321009978} is an apocalyptic number.

111222321009978 is an abundant number, since it is smaller than the sum of its proper divisors (111782634974502).

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

111222321009978 is a wasteful number, since it uses less digits than its factorization.

111222321009978 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 46692830381.

The product of its (nonzero) digits is 217728, while the sum is 48.

The spelling of 111222321009978 in words is "one hundred eleven trillion, two hundred twenty-two billion, three hundred twenty-one million, nine thousand, nine hundred seventy-eight".