121242204331 has 4 divisors (see below), whose sum is σ = 127623373000. Its totient is φ = 114861035664.

The previous prime is 121242204311. The next prime is 121242204337. The reversal of 121242204331 is 133402242121.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 133402242121 = 17 ⋅7847190713.

It is a cyclic number.

It is not a de Polignac number, because 121242204331 - 2¹¹ = 121242202283 is a prime.

It is a super-2 number, since 2×121242204331² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 121242204296 and 121242204305.

It is not an unprimeable number, because it can be changed into a prime (121242204337) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3190584306 + ... + 3190584343.

It is an arithmetic number, because the mean of its divisors is an integer number (31905843250).

Almost surely, 2^121242204331 is an apocalyptic number.

121242204331 is a deficient number, since it is larger than the sum of its proper divisors (6381168669).

121242204331 is an equidigital number, since it uses as much as digits as its factorization.

121242204331 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6381168668.

The product of its (nonzero) digits is 2304, while the sum is 25.

Adding to 121242204331 its reverse (133402242121), we get a palindrome (254644446452).

The spelling of 121242204331 in words is "one hundred twenty-one billion, two hundred forty-two million, two hundred four thousand, three hundred thirty-one".