21122120111110 has 8 divisors (see below), whose sum is σ = 38019816200016. Its totient is φ = 8448848044440.

The previous prime is 21122120111093. The next prime is 21122120111123. The reversal of 21122120111110 is 1111102122112.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×21122120111110² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1056106005546 + ... + 1056106005565.

It is an arithmetic number, because the mean of its divisors is an integer number (4752477025002).

Almost surely, 2^{21122120111110} is an apocalyptic number.

21122120111110 is a deficient number, since it is larger than the sum of its proper divisors (16897696088906).

21122120111110 is a wasteful number, since it uses less digits than its factorization.

21122120111110 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2112212011118.

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

Adding to 21122120111110 its reverse (1111102122112), we get a palindrome (22233222233222).

The spelling of 21122120111110 in words is "twenty-one trillion, one hundred twenty-two billion, one hundred twenty million, one hundred eleven thousand, one hundred ten".