111002210110021 has 4 divisors (see below), whose sum is σ = 111002551191532. Its totient is φ = 111001869028512.

The previous prime is 111002210110007. The next prime is 111002210110093. The reversal of 111002210110021 is 120011012200111.

It is a happy number.

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 32278930917025 + 78723279192996 = 5681455^2 + 8872614^2 .

It is a cyclic number.

It is not a de Polignac number, because 111002210110021 - 2¹⁹ = 111002209585733 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 111002210109983 and 111002210110010.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (111002210110721) 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, 170052126 + ... + 170703631.

It is an arithmetic number, because the mean of its divisors is an integer number (27750637797883).

Almost surely, 2^{111002210110021} is an apocalyptic number.

It is an amenable number.

111002210110021 is a deficient number, since it is larger than the sum of its proper divisors (341081511).

111002210110021 is an equidigital number, since it uses as much as digits as its factorization.

111002210110021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 341081510.

The product of its (nonzero) digits is 8, while the sum is 13.

Adding to 111002210110021 its reverse (120011012200111), we get a palindrome (231013222310132).

The spelling of 111002210110021 in words is "one hundred eleven trillion, two billion, two hundred ten million, one hundred ten thousand, twenty-one".