111220121200187 has 2 divisors, whose sum is σ = 111220121200188. Its totient is φ = 111220121200186.

The previous prime is 111220121200163. The next prime is 111220121200289. The reversal of 111220121200187 is 781002121022111.

It is a weak prime.

It is an emirp because it is prime and its reverse (781002121022111) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 111220121200187 - 2⁸ = 111220121199931 is a prime.

It is a super-3 number, since 3×111220121200187³ (a number of 43 digits) contains 333 as substring.

It is not a weakly prime, because it can be changed into another prime (111220121200147) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 55610060600093 + 55610060600094.

It is an arithmetic number, because the mean of its divisors is an integer number (55610060600094).

Almost surely, 2^{111220121200187} is an apocalyptic number.

111220121200187 is a deficient number, since it is larger than the sum of its proper divisors (1).

111220121200187 is an equidigital number, since it uses as much as digits as its factorization.

111220121200187 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 896, while the sum is 29.

Adding to 111220121200187 its reverse (781002121022111), we get a palindrome (892222242222298).

The spelling of 111220121200187 in words is "one hundred eleven trillion, two hundred twenty billion, one hundred twenty-one million, two hundred thousand, one hundred eighty-seven".