121131103 has 4 divisors (see below), whose sum is σ = 128256480. Its totient is φ = 114005728.

The previous prime is 121131077. The next prime is 121131121. The reversal of 121131103 is 301131121.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 301131121 = 281 ⋅1071641.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-121131103 is a prime.

It is a super-2 number, since 2×121131103² = 29345488227993218, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121131503) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3562663 + ... + 3562696.

It is an arithmetic number, because the mean of its divisors is an integer number (32064120).

Almost surely, 2^121131103 is an apocalyptic number.

121131103 is a deficient number, since it is larger than the sum of its proper divisors (7125377).

121131103 is an equidigital number, since it uses as much as digits as its factorization.

121131103 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7125376.

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

The square root of 121131103 is about 11005.9576139471. The cubic root of 121131103 is about 494.7873153569.

Adding to 121131103 its product of nonzero digits (18), we get a palindrome (121131121).

Adding to 121131103 its reverse (301131121), we get a palindrome (422262224).

The spelling of 121131103 in words is "one hundred twenty-one million, one hundred thirty-one thousand, one hundred three".