121404531331 has 2 divisors, whose sum is σ = 121404531332. Its totient is φ = 121404531330.

The previous prime is 121404531317. The next prime is 121404531343. The reversal of 121404531331 is 133135404121.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 121404531331 - 2⁷ = 121404531203 is a prime.

It is a super-2 number, since 2×121404531331² (a number of 23 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 121404531331.

It is not a weakly prime, because it can be changed into another prime (121404531361) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60702265665 + 60702265666.

It is an arithmetic number, because the mean of its divisors is an integer number (60702265666).

Almost surely, 2^121404531331 is an apocalyptic number.

121404531331 is a deficient number, since it is larger than the sum of its proper divisors (1).

121404531331 is an equidigital number, since it uses as much as digits as its factorization.

121404531331 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4320, while the sum is 28.

Adding to 121404531331 its reverse (133135404121), we get a palindrome (254539935452).

The spelling of 121404531331 in words is "one hundred twenty-one billion, four hundred four million, five hundred thirty-one thousand, three hundred thirty-one".