121311103 has 2 divisors, whose sum is σ = 121311104. Its totient is φ = 121311102.

The previous prime is 121311059. The next prime is 121311121. The reversal of 121311103 is 301113121.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 121311103 - 2²⁵ = 87756671 is a prime.

It is a super-2 number, since 2×121311103² = 29432767422153218, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (121311193) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60655551 + 60655552.

It is an arithmetic number, because the mean of its divisors is an integer number (60655552).

Almost surely, 2^121311103 is an apocalyptic number.

121311103 is a deficient number, since it is larger than the sum of its proper divisors (1).

121311103 is an equidigital number, since it uses as much as digits as its factorization.

121311103 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 18, while the sum is 13.

The square root of 121311103 is about 11014.1319676132. The cubic root of 121311103 is about 495.0322775946.

Adding to 121311103 its reverse (301113121), we get a palindrome (422424224).

The spelling of 121311103 in words is "one hundred twenty-one million, three hundred eleven thousand, one hundred three".