111102001210021 has 16 divisors (see below), whose sum is σ = 112810849642368. Its totient is φ = 109397239257600.

The previous prime is 111102001210019. The next prime is 111102001210127. The reversal of 111102001210021 is 120012100201111.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 111102001210021 - 2¹ = 111102001210019 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 111102001209983 and 111102001210010.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (111102001211021) 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 15 ways as a sum of consecutive naturals, for example, 182376285 + ... + 182984461.

It is an arithmetic number, because the mean of its divisors is an integer number (7050678102648).

Almost surely, 2^{111102001210021} is an apocalyptic number.

It is an amenable number.

111102001210021 is a deficient number, since it is larger than the sum of its proper divisors (1708848432347).

111102001210021 is a wasteful number, since it uses less digits than its factorization.

111102001210021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 611532.

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

Adding to 111102001210021 its reverse (120012100201111), we get a palindrome (231114101411132).

The spelling of 111102001210021 in words is "one hundred eleven trillion, one hundred two billion, one million, two hundred ten thousand, twenty-one".