121103100111 has 24 divisors (see below), whose sum is σ = 187858133040. Its totient is φ = 69192652032.

The previous prime is 121103100089. The next prime is 121103100133. The reversal of 121103100111 is 111001301121.

It is an interprime number because it is at equal distance from previous prime (121103100089) and next prime (121103100133).

It is not a de Polignac number, because 121103100111 - 2⁷ = 121103099983 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121103108111) 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 in 23 ways as a sum of consecutive naturals, for example, 1156545 + ... + 1256901.

It is an arithmetic number, because the mean of its divisors is an integer number (7827422210).

Almost surely, 2^121103100111 is an apocalyptic number.

121103100111 is a deficient number, since it is larger than the sum of its proper divisors (66755032929).

121103100111 is a wasteful number, since it uses less digits than its factorization.

121103100111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 108583 (or 108576 counting only the distinct ones).

The product of its (nonzero) digits is 6, while the sum is 12.

Adding to 121103100111 its reverse (111001301121), we get a palindrome (232104401232).

The spelling of 121103100111 in words is "one hundred twenty-one billion, one hundred three million, one hundred thousand, one hundred eleven".