111100010230021 has 4 divisors (see below), whose sum is σ = 117635304949452. Its totient is φ = 104564715510592.

The previous prime is 111100010230003. The next prime is 111100010230031. The reversal of 111100010230021 is 120032010001111.

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 32950343777121 + 78149666452900 = 5740239^2 + 8840230^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-111100010230021 is a prime.

It is a super-2 number, since 2×111100010230021² (a number of 29 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 111100010229983 and 111100010230010.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (111100010230031) 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, 3267647359690 + ... + 3267647359723.

It is an arithmetic number, because the mean of its divisors is an integer number (29408826237363).

Almost surely, 2^{111100010230021} is an apocalyptic number.

It is an amenable number.

111100010230021 is a deficient number, since it is larger than the sum of its proper divisors (6535294719431).

111100010230021 is an equidigital number, since it uses as much as digits as its factorization.

111100010230021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6535294719430.

The product of its (nonzero) digits is 12, while the sum is 13.

Adding to 111100010230021 its reverse (120032010001111), we get a palindrome (231132020231132).

The spelling of 111100010230021 in words is "one hundred eleven trillion, one hundred billion, ten million, two hundred thirty thousand, twenty-one".