111100012112021 has 4 divisors (see below), whose sum is σ = 112200012232044. Its totient is φ = 110000011992000.

The previous prime is 111100012112009. The next prime is 111100012112053. The reversal of 111100012112021 is 120211210001111.

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 76216636485796 + 34883375626225 = 8730214^2 + 5906215^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-111100012112021 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 111100012111987 and 111100012112005.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (111100012112821) 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, 550000059860 + ... + 550000060061.

It is an arithmetic number, because the mean of its divisors is an integer number (28050003058011).

Almost surely, 2^{111100012112021} is an apocalyptic number.

It is an amenable number.

111100012112021 is a deficient number, since it is larger than the sum of its proper divisors (1100000120023).

111100012112021 is a wasteful number, since it uses less digits than its factorization.

111100012112021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1100000120022.

The product of its (nonzero) digits is 8, while the sum is 14.

Adding to 111100012112021 its reverse (120211210001111), we get a palindrome (231311222113132).

The spelling of 111100012112021 in words is "one hundred eleven trillion, one hundred billion, twelve million, one hundred twelve thousand, twenty-one".