21110120110212 has 48 divisors (see below), whose sum is σ = 56296715029632. Its totient is φ = 6031134881280.

The previous prime is 21110120110207. The next prime is 21110120110267. The reversal of 21110120110212 is 21201102101112.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 21110120110191 and 21110120110200.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5277589 + ... + 8370972.

It is an arithmetic number, because the mean of its divisors is an integer number (1172848229784).

Almost surely, 2^{21110120110212} is an apocalyptic number.

It is an amenable number.

21110120110212 is an abundant number, since it is smaller than the sum of its proper divisors (35186594919420).

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

21110120110212 is a wasteful number, since it uses less digits than its factorization.

21110120110212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13666988 (or 13666986 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 15.

Adding to 21110120110212 its reverse (21201102101112), we get a palindrome (42311222211324).

The spelling of 21110120110212 in words is "twenty-one trillion, one hundred ten billion, one hundred twenty million, one hundred ten thousand, two hundred twelve".