121010103 has 6 divisors (see below), whose sum is σ = 174792384. Its totient is φ = 80673396.

The previous prime is 121010083. The next prime is 121010117. The reversal of 121010103 is 301010121.

It is not a de Polignac number, because 121010103 - 2⁶ = 121010039 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (9), and also a Moran number because the ratio is a prime number: 13445567 = 121010103 / (1 + 2 + 1 + 0 + 1 + 0 + 1 + 0 + 3).

It is an alternating number because its digits alternate between odd and even.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121010173) 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 5 ways as a sum of consecutive naturals, for example, 6722775 + ... + 6722792.

It is an arithmetic number, because the mean of its divisors is an integer number (29132064).

Almost surely, 2^121010103 is an apocalyptic number.

121010103 is a deficient number, since it is larger than the sum of its proper divisors (53782281).

121010103 is a wasteful number, since it uses less digits than its factorization.

121010103 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13445573 (or 13445570 counting only the distinct ones).

The product of its (nonzero) digits is 6, while the sum is 9.

The square root of 121010103 is about 11000.4592176872. The cubic root of 121010103 is about 494.6225098705.

Adding to 121010103 its reverse (301010121), we get a palindrome (422020224).

The spelling of 121010103 in words is "one hundred twenty-one million, ten thousand, one hundred three".