21222010022112 has 72 divisors (see below), whose sum is σ = 60372755627184. Its totient is φ = 7071346681344.

The previous prime is 21222010022111. The next prime is 21222010022231. The reversal of 21222010022112 is 21122001022212.

It is a happy number.

21222010022112 is a `hidden beast` number, since 212 + 220 + 1 + 0 + 0 + 221 + 12 = 666.

It is a tau number, because it is divible by the number of its divisors (72).

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21222010022111) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 13068493 + ... + 14602380.

It is an arithmetic number, because the mean of its divisors is an integer number (838510494822).

Almost surely, 2^{21222010022112} is an apocalyptic number.

It is an amenable number.

21222010022112 is an abundant number, since it is smaller than the sum of its proper divisors (39150745605072).

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

21222010022112 is a wasteful number, since it uses less digits than its factorization.

21222010022112 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27673552 (or 27673541 counting only the distinct ones).

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

Adding to 21222010022112 its reverse (21122001022212), we get a palindrome (42344011044324).

It can be divided in two parts, 212220100 and 22112, that added together give a palindrome (212242212).

The spelling of 21222010022112 in words is "twenty-one trillion, two hundred twenty-two billion, ten million, twenty-two thousand, one hundred twelve".