21111110222122 has 96 divisors (see below), whose sum is σ = 34589605317120. Its totient is φ = 9658222479360.

The previous prime is 21111110222117. The next prime is 21111110222123. The reversal of 21111110222122 is 22122201111112.

It is a happy number.

It is a super-3 number, since 3×21111110222122³ (a number of 41 digits) contains 333 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 21111110222122.

It is not an unprimeable number, because it can be changed into a prime (21111110222123) 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 47 ways as a sum of consecutive naturals, for example, 2103323688 + ... + 2103333724.

It is an arithmetic number, because the mean of its divisors is an integer number (360308388720).

Almost surely, 2^{21111110222122} is an apocalyptic number.

21111110222122 is a deficient number, since it is larger than the sum of its proper divisors (13478495094998).

21111110222122 is a wasteful number, since it uses less digits than its factorization.

21111110222122 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10856 (or 10839 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 19.

Adding to 21111110222122 its reverse (22122201111112), we get a palindrome (43233311333234).

The spelling of 21111110222122 in words is "twenty-one trillion, one hundred eleven billion, one hundred ten million, two hundred twenty-two thousand, one hundred twenty-two".