21120001111222 has 32 divisors (see below), whose sum is σ = 34686430087680. Its totient is φ = 9585960228000.

The previous prime is 21120001111109. The next prime is 21120001111229. The reversal of 21120001111222 is 22211110002112.

It is a junction number, because it is equal to n+sod(n) for n = 21120001111196 and 21120001111205.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21120001111229) 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 15 ways as a sum of consecutive naturals, for example, 19967268 + ... + 20998375.

It is an arithmetic number, because the mean of its divisors is an integer number (1083950940240).

Almost surely, 2^{21120001111222} is an apocalyptic number.

21120001111222 is a deficient number, since it is larger than the sum of its proper divisors (13566428976458).

21120001111222 is a wasteful number, since it uses less digits than its factorization.

21120001111222 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40965988.

The product of its (nonzero) digits is 32, while the sum is 16.

Adding to 21120001111222 its reverse (22211110002112), we get a palindrome (43331111113334).

The spelling of 21120001111222 in words is "twenty-one trillion, one hundred twenty billion, one million, one hundred eleven thousand, two hundred twenty-two".