12101120221978 has 32 divisors (see below), whose sum is σ = 18800488691712. Its totient is φ = 5835637612800.

The previous prime is 12101120221963. The next prime is 12101120221979. The reversal of 12101120221978 is 87912202110121.

It is a super-2 number, since 2×12101120221978² (a number of 27 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (12101120221979) 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 15 ways as a sum of consecutive naturals, for example, 25022575 + ... + 25501597.

It is an arithmetic number, because the mean of its divisors is an integer number (587515271616).

Almost surely, 2^{12101120221978} is an apocalyptic number.

12101120221978 is a deficient number, since it is larger than the sum of its proper divisors (6699368469734).

12101120221978 is a wasteful number, since it uses less digits than its factorization.

12101120221978 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 480430.

The product of its (nonzero) digits is 8064, while the sum is 37.

The spelling of 12101120221978 in words is "twelve trillion, one hundred one billion, one hundred twenty million, two hundred twenty-one thousand, nine hundred seventy-eight".