21110220220112 has 20 divisors (see below), whose sum is σ = 42679358271840. Its totient is φ = 10096192279008.

The previous prime is 21110220220097. The next prime is 21110220220129. The reversal of 21110220220112 is 21102202201112.

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, 28682364062 + ... + 28682364797.

It is an arithmetic number, because the mean of its divisors is an integer number (2133967913592).

Almost surely, 2^{21110220220112} is an apocalyptic number.

It is an amenable number.

21110220220112 is an abundant number, since it is smaller than the sum of its proper divisors (21569138051728).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21110220220112 is a wasteful number, since it uses less digits than its factorization.

21110220220112 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 57364728890 (or 57364728884 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 17.

Adding to 21110220220112 its reverse (21102202201112), we get a palindrome (42212422421224).

The spelling of 21110220220112 in words is "twenty-one trillion, one hundred ten billion, two hundred twenty million, two hundred twenty thousand, one hundred twelve".