211221211111112 has 64 divisors (see below), whose sum is σ = 400936131037440. Its totient is φ = 104310316800000.

The previous prime is 211221211111109. The next prime is 211221211111223. The reversal of 211221211111112 is 211111112122112.

It is a super-2 number, since 2×211221211111112² (a number of 29 digits) contains 22 as substring.

It is a nude number because it is divisible by every one of its digits.

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, 550182968 + ... + 550566744.

It is an arithmetic number, because the mean of its divisors is an integer number (6264627047460).

Almost surely, 2^{211221211111112} is an apocalyptic number.

It is an amenable number.

211221211111112 is a deficient number, since it is larger than the sum of its proper divisors (189714919926328).

211221211111112 is a wasteful number, since it uses less digits than its factorization.

211221211111112 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 385542 (or 385538 counting only the distinct ones).

The product of its digits is 32, while the sum is 20.

Adding to 211221211111112 its reverse (211111112122112), we get a palindrome (422332323233224).

The spelling of 211221211111112 in words is "two hundred eleven trillion, two hundred twenty-one billion, two hundred eleven million, one hundred eleven thousand, one hundred twelve".