111110002001021 has 12 divisors (see below), whose sum is σ = 117288671489244. Its totient is φ = 105241469832000.

The previous prime is 111110002001017. The next prime is 111110002001027. The reversal of 111110002001021 is 120100200011111.

It can be written as a sum of positive squares in 2 ways, for example, as 4767501938521 + 106342500062500 = 2183461^2 + 10312250^2 .

It is not a de Polignac number, because 111110002001021 - 2² = 111110002001017 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 111110002000993 and 111110002001011.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (111110002001027) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 28327520 + ... + 32010441.

It is an arithmetic number, because the mean of its divisors is an integer number (9774055957437).

Almost surely, 2^{111110002001021} is an apocalyptic number.

It is an amenable number.

111110002001021 is a deficient number, since it is larger than the sum of its proper divisors (6178669488223).

111110002001021 is an equidigital number, since it uses as much as digits as its factorization.

111110002001021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 60343100 (or 60343081 counting only the distinct ones).

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

Adding to 111110002001021 its reverse (120100200011111), we get a palindrome (231210202012132).

The spelling of 111110002001021 in words is "one hundred eleven trillion, one hundred ten billion, two million, one thousand, twenty-one".