121603401 has 12 divisors (see below), whose sum is σ = 184894320. Its totient is φ = 76802040.

The previous prime is 121603387. The next prime is 121603411. The reversal of 121603401 is 104306121.

It is a happy number.

121603401 is a `hidden beast` number, since 1 + 21 + 603 + 40 + 1 = 666.

It is not a de Polignac number, because 121603401 - 2⁶ = 121603337 is a prime.

It is not an unprimeable number, because it can be changed into a prime (121603411) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 355395 + ... + 355736.

It is an arithmetic number, because the mean of its divisors is an integer number (15407860).

Almost surely, 2^121603401 is an apocalyptic number.

It is an amenable number.

121603401 is a deficient number, since it is larger than the sum of its proper divisors (63290919).

121603401 is a wasteful number, since it uses less digits than its factorization.

121603401 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 711156 (or 711153 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 18.

The square root of 121603401 is about 11027.3932096393. The cubic root of 121603401 is about 495.4295506144.

Adding to 121603401 its reverse (104306121), we get a palindrome (225909522).

The spelling of 121603401 in words is "one hundred twenty-one million, six hundred three thousand, four hundred one".