121554103 has 8 divisors (see below), whose sum is σ = 138370176. Its totient is φ = 105699000.

The previous prime is 121554073. The next prime is 121554107. The reversal of 121554103 is 301455121.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 121554103 - 2⁵ = 121554071 is a prime.

It is a super-2 number, since 2×121554103² = 29550799912269218, 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 (121554107) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 239973 + ... + 240478.

It is an arithmetic number, because the mean of its divisors is an integer number (17296272).

Almost surely, 2^121554103 is an apocalyptic number.

121554103 is a deficient number, since it is larger than the sum of its proper divisors (16816073).

121554103 is a wasteful number, since it uses less digits than its factorization.

121554103 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 480485.

The product of its (nonzero) digits is 600, while the sum is 22.

The square root of 121554103 is about 11025.1577312980. The cubic root of 121554103 is about 495.3625925442.

The spelling of 121554103 in words is "one hundred twenty-one million, five hundred fifty-four thousand, one hundred three".