111161111651 has 2 divisors, whose sum is σ = 111161111652. Its totient is φ = 111161111650.

The previous prime is 111161111587. The next prime is 111161111669. The reversal of 111161111651 is 156111161111.

It is a strong prime.

It is an emirp because it is prime and its reverse (156111161111) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 111161111651 - 2⁶ = 111161111587 is a prime.

It is a Sophie Germain prime.

It is a self number, because there is not a number n which added to its sum of digits gives 111161111651.

It is not a weakly prime, because it can be changed into another prime (111161111671) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 55580555825 + 55580555826.

It is an arithmetic number, because the mean of its divisors is an integer number (55580555826).

Almost surely, 2^111161111651 is an apocalyptic number.

111161111651 is a deficient number, since it is larger than the sum of its proper divisors (1).

111161111651 is an equidigital number, since it uses as much as digits as its factorization.

111161111651 is an evil number, because the sum of its binary digits is even.

The product of its digits is 180, while the sum is 26.

Adding to 111161111651 its reverse (156111161111), we get a palindrome (267272272762).

The spelling of 111161111651 in words is "one hundred eleven billion, one hundred sixty-one million, one hundred eleven thousand, six hundred fifty-one".