111701812051 has 2 divisors, whose sum is σ = 111701812052. Its totient is φ = 111701812050.

The previous prime is 111701812049. The next prime is 111701812111. The reversal of 111701812051 is 150218107111.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 111701812051 - 2¹ = 111701812049 is a prime.

Together with 111701812049, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (111701812751) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 55850906025 + 55850906026.

It is an arithmetic number, because the mean of its divisors is an integer number (55850906026).

Almost surely, 2^111701812051 is an apocalyptic number.

111701812051 is a deficient number, since it is larger than the sum of its proper divisors (1).

111701812051 is an equidigital number, since it uses as much as digits as its factorization.

111701812051 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 560, while the sum is 28.

Adding to 111701812051 its reverse (150218107111), we get a palindrome (261919919162).

The spelling of 111701812051 in words is "one hundred eleven billion, seven hundred one million, eight hundred twelve thousand, fifty-one".