121243122331 has 2 divisors, whose sum is σ = 121243122332. Its totient is φ = 121243122330.

The previous prime is 121243122313. The next prime is 121243122389. The reversal of 121243122331 is 133221342121.

Together with previous prime (121243122313) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 121243122331 - 2¹⁵ = 121243089563 is a prime.

It is a super-2 number, since 2×121243122331² (a number of 23 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 121243122296 and 121243122305.

It is not a weakly prime, because it can be changed into another prime (121243122391) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60621561165 + 60621561166.

It is an arithmetic number, because the mean of its divisors is an integer number (60621561166).

Almost surely, 2^121243122331 is an apocalyptic number.

121243122331 is a deficient number, since it is larger than the sum of its proper divisors (1).

121243122331 is an equidigital number, since it uses as much as digits as its factorization.

121243122331 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1728, while the sum is 25.

Adding to 121243122331 its reverse (133221342121), we get a palindrome (254464464452).

The spelling of 121243122331 in words is "one hundred twenty-one billion, two hundred forty-three million, one hundred twenty-two thousand, three hundred thirty-one".