111012201161 has 2 divisors, whose sum is σ = 111012201162. Its totient is φ = 111012201160.

The previous prime is 111012201119. The next prime is 111012201163. The reversal of 111012201161 is 161102210111.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 67466945536 + 43545255625 = 259744^2 + 208675^2 .

It is a cyclic number.

It is not a de Polignac number, because 111012201161 - 2³⁴ = 93832331977 is a prime.

It is a super-2 number, since 2×111012201161² (a number of 23 digits) contains 22 as substring.

Together with 111012201163, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (111012201163) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 55506100580 + 55506100581.

It is an arithmetic number, because the mean of its divisors is an integer number (55506100581).

Almost surely, 2^111012201161 is an apocalyptic number.

It is an amenable number.

111012201161 is a deficient number, since it is larger than the sum of its proper divisors (1).

111012201161 is an equidigital number, since it uses as much as digits as its factorization.

111012201161 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 24, while the sum is 17.

Adding to 111012201161 its reverse (161102210111), we get a palindrome (272114411272).

The spelling of 111012201161 in words is "one hundred eleven billion, twelve million, two hundred one thousand, one hundred sixty-one".