121111097807807 has 2 divisors, whose sum is σ = 121111097807808. Its totient is φ = 121111097807806.

The previous prime is 121111097807771. The next prime is 121111097807827. The reversal of 121111097807807 is 708708790111121.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 121111097807807 - 2¹⁴ = 121111097791423 is a prime.

It is a super-2 number, since 2×121111097807807² (a number of 29 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (121111097807827) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (31) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60555548903903 + 60555548903904.

It is an arithmetic number, because the mean of its divisors is an integer number (60555548903904).

Almost surely, 2^{121111097807807} is an apocalyptic number.

121111097807807 is a deficient number, since it is larger than the sum of its proper divisors (1).

121111097807807 is an equidigital number, since it uses as much as digits as its factorization.

121111097807807 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 395136, while the sum is 53.

The spelling of 121111097807807 in words is "one hundred twenty-one trillion, one hundred eleven billion, ninety-seven million, eight hundred seven thousand, eight hundred seven".