111012100001993 has 4 divisors (see below), whose sum is σ = 117542223531540. Its totient is φ = 104481976472448.

The previous prime is 111012100001981. The next prime is 111012100002029. The reversal of 111012100001993 is 399100001210111.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 89240292037264 + 21771807964729 = 9446708^2 + 4666027^2 .

It is a cyclic number.

It is not a de Polignac number, because 111012100001993 - 2¹⁶ = 111012099936457 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (111012100007993) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3265061764748 + ... + 3265061764781.

It is an arithmetic number, because the mean of its divisors is an integer number (29385555882885).

Almost surely, 2^{111012100001993} is an apocalyptic number.

It is an amenable number.

111012100001993 is a deficient number, since it is larger than the sum of its proper divisors (6530123529547).

111012100001993 is an equidigital number, since it uses as much as digits as its factorization.

111012100001993 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6530123529546.

The product of its (nonzero) digits is 486, while the sum is 29.

The spelling of 111012100001993 in words is "one hundred eleven trillion, twelve billion, one hundred million, one thousand, nine hundred ninety-three".