21212222300112 has 40 divisors (see below), whose sum is σ = 54996068561056. Its totient is φ = 7045214622336.

The previous prime is 21212222300089. The next prime is 21212222300117. The reversal of 21212222300112 is 21100322221212.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21212222300117) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 797678578 + ... + 797705169.

Almost surely, 2^{21212222300112} is an apocalyptic number.

It is an amenable number.

21212222300112 is an abundant number, since it is smaller than the sum of its proper divisors (33783846260944).

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

21212222300112 is a wasteful number, since it uses less digits than its factorization.

21212222300112 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1595384035 (or 1595384029 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 21.

Adding to 21212222300112 its reverse (21100322221212), we get a palindrome (42312544521324).

The spelling of 21212222300112 in words is "twenty-one trillion, two hundred twelve billion, two hundred twenty-two million, three hundred thousand, one hundred twelve".