211221211101112 has 32 divisors (see below), whose sum is σ = 398312982662400. Its totient is φ = 105004595575264.

The previous prime is 211221211101079. The next prime is 211221211101119. The reversal of 211221211101112 is 211101112122112.

It is a super-2 number, since 2×211221211101112² (a number of 29 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 211221211101112.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (211221211101119) 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, 1839088 + ... + 20635519.

It is an arithmetic number, because the mean of its divisors is an integer number (12447280708200).

Almost surely, 2^{211221211101112} is an apocalyptic number.

It is an amenable number.

211221211101112 is a deficient number, since it is larger than the sum of its proper divisors (187091771561288).

211221211101112 is a wasteful number, since it uses less digits than its factorization.

211221211101112 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22481355 (or 22481351 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 19.

Adding to 211221211101112 its reverse (211101112122112), we get a palindrome (422322323223224).

The spelling of 211221211101112 in words is "two hundred eleven trillion, two hundred twenty-one billion, two hundred eleven million, one hundred one thousand, one hundred twelve".