221022122078 has 8 divisors (see below), whose sum is σ = 331762305072. Its totient is φ = 110434687056.

The previous prime is 221022122077. The next prime is 221022122129. The reversal of 221022122078 is 870221220122.

It is a happy number.

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

It is a self number, because there is not a number n which added to its sum of digits gives 221022122078.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221022122077) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 38183375 + ... + 38189162.

It is an arithmetic number, because the mean of its divisors is an integer number (41470288134).

Almost surely, 2^221022122078 is an apocalyptic number.

221022122078 is a deficient number, since it is larger than the sum of its proper divisors (110740182994).

221022122078 is a wasteful number, since it uses less digits than its factorization.

221022122078 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 76373986.

The product of its (nonzero) digits is 3584, while the sum is 29.

The spelling of 221022122078 in words is "two hundred twenty-one billion, twenty-two million, one hundred twenty-two thousand, seventy-eight".