21112022220012 has 18 divisors (see below), whose sum is σ = 53366500611788. Its totient is φ = 7037340739992.

The previous prime is 21112022219867. The next prime is 21112022220031. The reversal of 21112022220012 is 21002222021112.

It is a happy number.

21112022220012 is a `hidden beast` number, since 211 + 1 + 20 + 222 + 200 + 12 = 666.

It is a tau number, because it is divible by the number of its divisors (18).

It is a Harshad number since it is a multiple of its sum of digits (18).

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 293222530798 + ... + 293222530869.

Almost surely, 2^{21112022220012} is an apocalyptic number.

It is an amenable number.

21112022220012 is an abundant number, since it is smaller than the sum of its proper divisors (32254478391776).

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

21112022220012 is a wasteful number, since it uses less digits than its factorization.

21112022220012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 586445061677 (or 586445061672 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 18.

Adding to 21112022220012 its reverse (21002222021112), we get a palindrome (42114244241124).

The spelling of 21112022220012 in words is "twenty-one trillion, one hundred twelve billion, twenty-two million, two hundred twenty thousand, twelve".