111003113030021 has 4 divisors (see below), whose sum is σ = 113097511389132. Its totient is φ = 108908714670912.

The previous prime is 111003113029999. The next prime is 111003113030059. The reversal of 111003113030021 is 120030311300111.

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 98347662527521 + 12655450502500 = 9917039^2 + 3557450^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-111003113030021 is a prime.

It is a super-2 number, since 2×111003113030021² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (111003113230021) 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 in 3 ways as a sum of consecutive naturals, for example, 1047199179476 + ... + 1047199179581.

It is an arithmetic number, because the mean of its divisors is an integer number (28274377847283).

Almost surely, 2^{111003113030021} is an apocalyptic number.

It is an amenable number.

111003113030021 is a deficient number, since it is larger than the sum of its proper divisors (2094398359111).

111003113030021 is an equidigital number, since it uses as much as digits as its factorization.

111003113030021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2094398359110.

The product of its (nonzero) digits is 54, while the sum is 17.

Adding to 111003113030021 its reverse (120030311300111), we get a palindrome (231033424330132).

The spelling of 111003113030021 in words is "one hundred eleven trillion, three billion, one hundred thirteen million, thirty thousand, twenty-one".