21221001111122 has 8 divisors (see below), whose sum is σ = 31831739916672. Its totient is φ = 10610421138900.

The previous prime is 21221001111077. The next prime is 21221001111139. The reversal of 21221001111122 is 22111110012212.

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 21221001111122.

It is an unprimeable number.

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, 39373754 + ... + 39909077.

It is an arithmetic number, because the mean of its divisors is an integer number (3978967489584).

Almost surely, 2^{21221001111122} is an apocalyptic number.

21221001111122 is a deficient number, since it is larger than the sum of its proper divisors (10610738805550).

21221001111122 is a wasteful number, since it uses less digits than its factorization.

21221001111122 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 79416664.

The product of its (nonzero) digits is 32, while the sum is 17.

Adding to 21221001111122 its reverse (22111110012212), we get a palindrome (43332111123334).

The spelling of 21221001111122 in words is "twenty-one trillion, two hundred twenty-one billion, one million, one hundred eleven thousand, one hundred twenty-two".