211221110112112 has 80 divisors (see below), whose sum is σ = 421280162772480. Its totient is φ = 102561988838400.

The previous prime is 211221110112109. The next prime is 211221110112151. The reversal of 211221110112112 is 211211011122112.

It is a super-2 number, since 2×211221110112112² (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 211221110112112.

It is a congruent number.

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, 13066687 + ... + 24355297.

It is an arithmetic number, because the mean of its divisors is an integer number (5266002034656).

Almost surely, 2^{211221110112112} is an apocalyptic number.

It is an amenable number.

211221110112112 is a deficient number, since it is larger than the sum of its proper divisors (210059052660368).

211221110112112 is a wasteful number, since it uses less digits than its factorization.

211221110112112 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11288942 (or 11288936 counting only the distinct ones).

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

Adding to 211221110112112 its reverse (211211011122112), we get a palindrome (422432121234224).

The spelling of 211221110112112 in words is "two hundred eleven trillion, two hundred twenty-one billion, one hundred ten million, one hundred twelve thousand, one hundred twelve".