121204431005 has 16 divisors (see below), whose sum is σ = 171585260544. Its totient is φ = 80430589440.

The previous prime is 121204430989. The next prime is 121204431059. The reversal of 121204431005 is 500134402121.

It is not a de Polignac number, because 121204431005 - 2⁴ = 121204430989 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 55853492 + ... + 55855661.

It is an arithmetic number, because the mean of its divisors is an integer number (10724078784).

Almost surely, 2^121204431005 is an apocalyptic number.

It is an amenable number.

121204431005 is a deficient number, since it is larger than the sum of its proper divisors (50380829539).

121204431005 is a wasteful number, since it uses less digits than its factorization.

121204431005 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 111709196.

The product of its (nonzero) digits is 960, while the sum is 23.

Adding to 121204431005 its reverse (500134402121), we get a palindrome (621338833126).

The spelling of 121204431005 in words is "one hundred twenty-one billion, two hundred four million, four hundred thirty-one thousand, five".