111100001012021 has 6 divisors (see below), whose sum is σ = 129238776687510. Its totient is φ = 95228572295976.

The previous prime is 111100001011991. The next prime is 111100001012069. The reversal of 111100001012021 is 120210100001111.

It can be written as a sum of positive squares in only one way, i.e., 77188770489796 + 33911230522225 = 8785714^2 + 5823335^2 .

It is a de Polignac number, because none of the positive numbers 2^k-111100001012021 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 111100001011993 and 111100001012011.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (111100001032021) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1133673479666 + ... + 1133673479763.

It is an arithmetic number, because the mean of its divisors is an integer number (21539796114585).

Almost surely, 2^{111100001012021} is an apocalyptic number.

It is an amenable number.

111100001012021 is a deficient number, since it is larger than the sum of its proper divisors (18138775675489).

111100001012021 is an equidigital number, since it uses as much as digits as its factorization.

111100001012021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2267346959443 (or 2267346959436 counting only the distinct ones).

The product of its (nonzero) digits is 4, while the sum is 11.

Adding to 111100001012021 its reverse (120210100001111), we get a palindrome (231310101013132).

The spelling of 111100001012021 in words is "one hundred eleven trillion, one hundred billion, one million, twelve thousand, twenty-one".