21110122112012 has 12 divisors (see below), whose sum is σ = 37028427651936. Its totient is φ = 10530571354320.

The previous prime is 21110122111807. The next prime is 21110122112063. The reversal of 21110122112012 is 21021122101112.

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, 6122423483 + ... + 6122426930.

It is an arithmetic number, because the mean of its divisors is an integer number (3085702304328).

Almost surely, 2^{21110122112012} is an apocalyptic number.

It is an amenable number.

21110122112012 is a deficient number, since it is larger than the sum of its proper divisors (15918305539924).

21110122112012 is a wasteful number, since it uses less digits than its factorization.

21110122112012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12244850848 (or 12244850846 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 17.

Adding to 21110122112012 its reverse (21021122101112), we get a palindrome (42131244213124).

The spelling of 21110122112012 in words is "twenty-one trillion, one hundred ten billion, one hundred twenty-two million, one hundred twelve thousand, twelve".