121051603 has 6 divisors (see below), whose sum is σ = 127758444. Its totient is φ = 114680124.

The previous prime is 121051549. The next prime is 121051607. The reversal of 121051603 is 306150121.

It is not a de Polignac number, because 121051603 - 2¹⁷ = 120920531 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (19).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (121051607) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 167301 + ... + 168022.

It is an arithmetic number, because the mean of its divisors is an integer number (21293074).

Almost surely, 2^121051603 is an apocalyptic number.

121051603 is a deficient number, since it is larger than the sum of its proper divisors (6706841).

121051603 is an equidigital number, since it uses as much as digits as its factorization.

121051603 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 335361 (or 335342 counting only the distinct ones).

The product of its (nonzero) digits is 180, while the sum is 19.

The square root of 121051603 is about 11002.3453408807. The cubic root of 121051603 is about 494.6790464394.

The spelling of 121051603 in words is "one hundred twenty-one million, fifty-one thousand, six hundred three".