21222202011112 has 16 divisors (see below), whose sum is σ = 39898308746340. Its totient is φ = 10582653012096.

The previous prime is 21222202011107. The next prime is 21222202011113. The reversal of 21222202011112 is 21111020222212.

It can be written as a sum of positive squares in 2 ways, for example, as 20238427653796 + 983774357316 = 4498714^2 + 991854^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 21222202011112.

It is not an unprimeable number, because it can be changed into a prime (21222202011113) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3555996013 + ... + 3556001980.

Almost surely, 2^{21222202011112} is an apocalyptic number.

It is an amenable number.

21222202011112 is a deficient number, since it is larger than the sum of its proper divisors (18676106735228).

21222202011112 is a wasteful number, since it uses less digits than its factorization.

21222202011112 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7111998372 (or 7111998368 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 19.

Adding to 21222202011112 its reverse (21111020222212), we get a palindrome (42333222233324).

The spelling of 21222202011112 in words is "twenty-one trillion, two hundred twenty-two billion, two hundred two million, eleven thousand, one hundred twelve".