121405351503 has 8 divisors (see below), whose sum is σ = 161945215488. Its totient is φ = 80901194264.

The previous prime is 121405351493. The next prime is 121405351549. The reversal of 121405351503 is 305153504121.

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

It is a cyclic number.

It is not a de Polignac number, because 121405351503 - 2⁸ = 121405351247 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121405361503) 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, 8918751 + ... + 8932352.

It is an arithmetic number, because the mean of its divisors is an integer number (20243151936).

Almost surely, 2^121405351503 is an apocalyptic number.

121405351503 is a deficient number, since it is larger than the sum of its proper divisors (40539863985).

121405351503 is a wasteful number, since it uses less digits than its factorization.

121405351503 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17853373.

The product of its (nonzero) digits is 9000, while the sum is 30.

Adding to 121405351503 its reverse (305153504121), we get a palindrome (426558855624).

The spelling of 121405351503 in words is "one hundred twenty-one billion, four hundred five million, three hundred fifty-one thousand, five hundred three".