211221102011112 has 96 divisors (see below), whose sum is σ = 637586917905600. Its totient is φ = 62777788826112.

The previous prime is 211221102011107. The next prime is 211221102011123. The reversal of 211221102011112 is 211110201122112.

It is a happy number.

211221102011112 is a `hidden beast` number, since 211 + 221 + 10 + 201 + 11 + 12 = 666.

It is a super-2 number, since 2×211221102011112² (a number of 29 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 4541194108 + ... + 4541240619.

It is an arithmetic number, because the mean of its divisors is an integer number (6641530394850).

Almost surely, 2^{211221102011112} is an apocalyptic number.

It is an amenable number.

211221102011112 is an abundant number, since it is smaller than the sum of its proper divisors (426365815894488).

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

211221102011112 is a wasteful number, since it uses less digits than its factorization.

211221102011112 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9082434775 (or 9082434768 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 18.

Adding to 211221102011112 its reverse (211110201122112), we get a palindrome (422331303133224).

The spelling of 211221102011112 in words is "two hundred eleven trillion, two hundred twenty-one billion, one hundred two million, eleven thousand, one hundred twelve".