21021110111122 has 16 divisors (see below), whose sum is σ = 34400081600352. Its totient is φ = 9554521878720.

The previous prime is 21021110111101. The next prime is 21021110111137. The reversal of 21021110111122 is 22111101112012.

It is a junction number, because it is equal to n+sod(n) for n = 21021110111096 and 21021110111105.

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, 26001408 + ... + 26797675.

It is an arithmetic number, because the mean of its divisors is an integer number (2150005100022).

Almost surely, 2^{21021110111122} is an apocalyptic number.

21021110111122 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

21021110111122 is a deficient number, since it is larger than the sum of its proper divisors (13378971489230).

21021110111122 is a wasteful number, since it uses less digits than its factorization.

21021110111122 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 52817193.

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

Adding to 21021110111122 its reverse (22111101112012), we get a palindrome (43132211223134).

The spelling of 21021110111122 in words is "twenty-one trillion, twenty-one billion, one hundred ten million, one hundred eleven thousand, one hundred twenty-two".