111032120011721 has 2 divisors, whose sum is σ = 111032120011722. Its totient is φ = 111032120011720.

The previous prime is 111032120011693. The next prime is 111032120011739. The reversal of 111032120011721 is 127110021230111.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 102660240715321 + 8371879296400 = 10132139^2 + 2893420^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-111032120011721 is a prime.

It is not a weakly prime, because it can be changed into another prime (111032120014721) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 55516060005860 + 55516060005861.

It is an arithmetic number, because the mean of its divisors is an integer number (55516060005861).

Almost surely, 2^{111032120011721} is an apocalyptic number.

It is an amenable number.

111032120011721 is a deficient number, since it is larger than the sum of its proper divisors (1).

111032120011721 is an equidigital number, since it uses as much as digits as its factorization.

111032120011721 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 168, while the sum is 23.

Adding to 111032120011721 its reverse (127110021230111), we get a palindrome (238142141241832).

The spelling of 111032120011721 in words is "one hundred eleven trillion, thirty-two billion, one hundred twenty million, eleven thousand, seven hundred twenty-one".