121220111188823 has 2 divisors, whose sum is σ = 121220111188824. Its totient is φ = 121220111188822.

The previous prime is 121220111188777. The next prime is 121220111188849. The reversal of 121220111188823 is 328881111022121.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 121220111188823 - 2³⁰ = 121219037446999 is a prime.

It is a super-2 number, since 2×121220111188823² (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 (121220111182823) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60610055594411 + 60610055594412.

It is an arithmetic number, because the mean of its divisors is an integer number (60610055594412).

Almost surely, 2^{121220111188823} is an apocalyptic number.

121220111188823 is a deficient number, since it is larger than the sum of its proper divisors (1).

121220111188823 is an equidigital number, since it uses as much as digits as its factorization.

121220111188823 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 24576, while the sum is 41.

The spelling of 121220111188823 in words is "one hundred twenty-one trillion, two hundred twenty billion, one hundred eleven million, one hundred eighty-eight thousand, eight hundred twenty-three".