121111418503 has 2 divisors, whose sum is σ = 121111418504. Its totient is φ = 121111418502.

The previous prime is 121111418489. The next prime is 121111418563. The reversal of 121111418503 is 305814111121.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 121111418503 - 2⁹ = 121111417991 is a prime.

It is a super-2 number, since 2×121111418503² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (121111418563) 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, 60555709251 + 60555709252.

It is an arithmetic number, because the mean of its divisors is an integer number (60555709252).

Almost surely, 2^121111418503 is an apocalyptic number.

121111418503 is a deficient number, since it is larger than the sum of its proper divisors (1).

121111418503 is an equidigital number, since it uses as much as digits as its factorization.

121111418503 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 960, while the sum is 28.

Adding to 121111418503 its reverse (305814111121), we get a palindrome (426925529624).

The spelling of 121111418503 in words is "one hundred twenty-one billion, one hundred eleven million, four hundred eighteen thousand, five hundred three".