211221112102 has 64 divisors (see below), whose sum is σ = 432370326528. Its totient is φ = 74718288000.

The previous prime is 211221112097. The next prime is 211221112169. The reversal of 211221112102 is 201211122112.

211221112102 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×211221112102² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 742674 + ... + 986917.

It is an arithmetic number, because the mean of its divisors is an integer number (6755786352).

Almost surely, 2^211221112102 is an apocalyptic number.

211221112102 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

211221112102 is an abundant number, since it is smaller than the sum of its proper divisors (221149214426).

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

211221112102 is a wasteful number, since it uses less digits than its factorization.

211221112102 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1729685.

The product of its (nonzero) digits is 32, while the sum is 16.

Adding to 211221112102 its reverse (201211122112), we get a palindrome (412432234214).

It can be divided in two parts, 211221 and 112102, that added together give a palindrome (323323).

The spelling of 211221112102 in words is "two hundred eleven billion, two hundred twenty-one million, one hundred twelve thousand, one hundred two".