121211103 has 24 divisors (see below), whose sum is σ = 176828848. Its totient is φ = 73410048.

The previous prime is 121211063. The next prime is 121211113. The reversal of 121211103 is 301112121.

It is not a de Polignac number, because 121211103 - 2¹² = 121207007 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121211113) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 677068 + ... + 677246.

Almost surely, 2^121211103 is an apocalyptic number.

121211103 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

121211103 is a deficient number, since it is larger than the sum of its proper divisors (55617745).

121211103 is an equidigital number, since it uses as much as digits as its factorization.

121211103 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 471 (or 292 counting only the distinct ones).

The product of its (nonzero) digits is 12, while the sum is 12.

The square root of 121211103 is about 11009.5914093122. The cubic root of 121211103 is about 494.8962174015.

Adding to 121211103 its reverse (301112121), we get a palindrome (422323224).

The spelling of 121211103 in words is "one hundred twenty-one million, two hundred eleven thousand, one hundred three".