221042042122 has 32 divisors (see below), whose sum is σ = 387596228544. Its totient is φ = 93424108800.

The previous prime is 221042042113. The next prime is 221042042203. The reversal of 221042042122 is 221240240122.

221042042122 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (22).

It is a junction number, because it is equal to n+sod(n) for n = 221042042093 and 221042042102.

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 15 ways as a sum of consecutive naturals, for example, 3529329 + ... + 3591412.

It is an arithmetic number, because the mean of its divisors is an integer number (12112382142).

Almost surely, 2^221042042122 is an apocalyptic number.

221042042122 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

221042042122 is a deficient number, since it is larger than the sum of its proper divisors (166554186422).

221042042122 is a wasteful number, since it uses less digits than its factorization.

221042042122 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7120854.

The product of its (nonzero) digits is 1024, while the sum is 22.

Adding to 221042042122 its reverse (221240240122), we get a palindrome (442282282244).

The spelling of 221042042122 in words is "two hundred twenty-one billion, forty-two million, forty-two thousand, one hundred twenty-two".