12212121103 has 16 divisors (see below), whose sum is σ = 15036356160. Its totient is φ = 9658446336.

The previous prime is 12212121079. The next prime is 12212121143. The reversal of 12212121103 is 30112121221.

It is not a de Polignac number, because 12212121103 - 2¹⁷ = 12211990031 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12212121143) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 211701 + ... + 263137.

It is an arithmetic number, because the mean of its divisors is an integer number (939772260).

Almost surely, 2^12212121103 is an apocalyptic number.

12212121103 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

12212121103 is a deficient number, since it is larger than the sum of its proper divisors (2824235057).

12212121103 is a wasteful number, since it uses less digits than its factorization.

12212121103 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 54066.

The product of its (nonzero) digits is 48, while the sum is 16.

Adding to 12212121103 its reverse (30112121221), we get a palindrome (42324242324).

The spelling of 12212121103 in words is "twelve billion, two hundred twelve million, one hundred twenty-one thousand, one hundred three".