111101983661 has 2 divisors, whose sum is σ = 111101983662. Its totient is φ = 111101983660.

The previous prime is 111101983627. The next prime is 111101983669. The reversal of 111101983661 is 166389101111.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 59538928036 + 51563055625 = 244006^2 + 227075^2 .

It is a cyclic number.

It is not a de Polignac number, because 111101983661 - 2²² = 111097789357 is a prime.

It is a super-2 number, since 2×111101983661² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (111101983669) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 55550991830 + 55550991831.

It is an arithmetic number, because the mean of its divisors is an integer number (55550991831).

Almost surely, 2^111101983661 is an apocalyptic number.

It is an amenable number.

111101983661 is a deficient number, since it is larger than the sum of its proper divisors (1).

111101983661 is an equidigital number, since it uses as much as digits as its factorization.

111101983661 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 7776, while the sum is 38.

The spelling of 111101983661 in words is "one hundred eleven billion, one hundred one million, nine hundred eighty-three thousand, six hundred sixty-one".