121223331331 has 4 divisors (see below), whose sum is σ = 121832494000. Its totient is φ = 120614168664.

The previous prime is 121223331311. The next prime is 121223331373. The reversal of 121223331331 is 133133322121.

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 121223331331 - 2²¹ = 121221234179 is a prime.

It is a super-2 number, since 2×121223331331² (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 = 121223331296 and 121223331305.

It is not an unprimeable number, because it can be changed into a prime (121223331311) 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, 304581036 + ... + 304581433.

It is an arithmetic number, because the mean of its divisors is an integer number (30458123500).

Almost surely, 2^121223331331 is an apocalyptic number.

121223331331 is a deficient number, since it is larger than the sum of its proper divisors (609162669).

121223331331 is an equidigital number, since it uses as much as digits as its factorization.

121223331331 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 609162668.

The product of its digits is 1944, while the sum is 25.

Adding to 121223331331 its reverse (133133322121), we get a palindrome (254356653452).

The spelling of 121223331331 in words is "one hundred twenty-one billion, two hundred twenty-three million, three hundred thirty-one thousand, three hundred thirty-one".