121251326311 has 2 divisors, whose sum is σ = 121251326312. Its totient is φ = 121251326310.

The previous prime is 121251326297. The next prime is 121251326327. The reversal of 121251326311 is 113623152121.

It is a weak prime.

It is an emirp because it is prime and its reverse (113623152121) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 121251326311 - 2⁹ = 121251325799 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 121251326311.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (121251326381) 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 as a sum of consecutive naturals, namely, 60625663155 + 60625663156.

It is an arithmetic number, because the mean of its divisors is an integer number (60625663156).

Almost surely, 2^121251326311 is an apocalyptic number.

121251326311 is a deficient number, since it is larger than the sum of its proper divisors (1).

121251326311 is an equidigital number, since it uses as much as digits as its factorization.

121251326311 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2160, while the sum is 28.

Adding to 121251326311 its reverse (113623152121), we get a palindrome (234874478432).

The spelling of 121251326311 in words is "one hundred twenty-one billion, two hundred fifty-one million, three hundred twenty-six thousand, three hundred eleven".