121729803803 has 4 divisors (see below), whose sum is σ = 124026592608. Its totient is φ = 119433015000.

The previous prime is 121729803799. The next prime is 121729803817. The reversal of 121729803803 is 308308927121.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 121729803803 - 2² = 121729803799 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (121729203803) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1148394323 + ... + 1148394428.

It is an arithmetic number, because the mean of its divisors is an integer number (31006648152).

Almost surely, 2^121729803803 is an apocalyptic number.

121729803803 is a deficient number, since it is larger than the sum of its proper divisors (2296788805).

121729803803 is an equidigital number, since it uses as much as digits as its factorization.

121729803803 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2296788804.

The product of its (nonzero) digits is 145152, while the sum is 44.

The spelling of 121729803803 in words is "one hundred twenty-one billion, seven hundred twenty-nine million, eight hundred three thousand, eight hundred three".