121242399245 has 16 divisors (see below), whose sum is σ = 160200669888. Its totient is φ = 87352208640.

The previous prime is 121242399227. The next prime is 121242399293. The reversal of 121242399245 is 542993242121.

It is not a de Polignac number, because 121242399245 - 2¹⁴ = 121242382861 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 121242399196 and 121242399205.

It is a congruent number.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 10295084 + ... + 10306853.

It is an arithmetic number, because the mean of its divisors is an integer number (10012541868).

Almost surely, 2^121242399245 is an apocalyptic number.

It is an amenable number.

121242399245 is a deficient number, since it is larger than the sum of its proper divisors (38958270643).

121242399245 is a wasteful number, since it uses less digits than its factorization.

121242399245 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20602060.

The product of its digits is 311040, while the sum is 44.

The spelling of 121242399245 in words is "one hundred twenty-one billion, two hundred forty-two million, three hundred ninety-nine thousand, two hundred forty-five".