111021020017 has 2 divisors, whose sum is σ = 111021020018. Its totient is φ = 111021020016.

The previous prime is 111021019979. The next prime is 111021020113. The reversal of 111021020017 is 710020120111.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 104163689536 + 6857330481 = 322744^2 + 82809^2 .

It is a cyclic number.

It is not a de Polignac number, because 111021020017 - 2¹⁵ = 111020987249 is a prime.

It is a super-2 number, since 2×111021020017² (a number of 23 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (111021023017) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 55510510008 + 55510510009.

It is an arithmetic number, because the mean of its divisors is an integer number (55510510009).

Almost surely, 2^111021020017 is an apocalyptic number.

It is an amenable number.

111021020017 is a deficient number, since it is larger than the sum of its proper divisors (1).

111021020017 is an equidigital number, since it uses as much as digits as its factorization.

111021020017 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 28, while the sum is 16.

Adding to 111021020017 its reverse (710020120111), we get a palindrome (821041140128).

The spelling of 111021020017 in words is "one hundred eleven billion, twenty-one million, twenty thousand, seventeen".