21112211012122 has 16 divisors (see below), whose sum is σ = 33336289736640. Its totient is φ = 10000155090528.

The previous prime is 21112211012119. The next prime is 21112211012147. The reversal of 21112211012122 is 22121011221112.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (19).

It is a self number, because there is not a number n which added to its sum of digits gives 21112211012122.

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 7 ways as a sum of consecutive naturals, for example, 9110683 + ... + 11190574.

It is an arithmetic number, because the mean of its divisors is an integer number (2083518108540).

Almost surely, 2^{21112211012122} is an apocalyptic number.

21112211012122 is a deficient number, since it is larger than the sum of its proper divisors (12224078724518).

21112211012122 is a wasteful number, since it uses less digits than its factorization.

21112211012122 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20328645.

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

Adding to 21112211012122 its reverse (22121011221112), we get a palindrome (43233222233234).

The spelling of 21112211012122 in words is "twenty-one trillion, one hundred twelve billion, two hundred eleven million, twelve thousand, one hundred twenty-two".