121111413443 has 2 divisors, whose sum is σ = 121111413444. Its totient is φ = 121111413442.

The previous prime is 121111413431. The next prime is 121111413503. The reversal of 121111413443 is 344314111121.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 121111413443 - 2²⁰ = 121110364867 is a prime.

It is a super-2 number, since 2×121111413443² (a number of 23 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (121111113443) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60555706721 + 60555706722.

It is an arithmetic number, because the mean of its divisors is an integer number (60555706722).

Almost surely, 2^121111413443 is an apocalyptic number.

121111413443 is a deficient number, since it is larger than the sum of its proper divisors (1).

121111413443 is an equidigital number, since it uses as much as digits as its factorization.

121111413443 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1152, while the sum is 26.

Adding to 121111413443 its reverse (344314111121), we get a palindrome (465425524564).

The spelling of 121111413443 in words is "one hundred twenty-one billion, one hundred eleven million, four hundred thirteen thousand, four hundred forty-three".