111321200110021 has 4 divisors (see below), whose sum is σ = 121441309210944. Its totient is φ = 101201091009100.

The previous prime is 111321200110009. The next prime is 111321200110051. The reversal of 111321200110021 is 120011002123111.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 111321200110021 - 2¹⁹ = 111321199585733 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 111321200109977 and 111321200110004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (111321200110051) 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, 5060054550445 + ... + 5060054550466.

It is an arithmetic number, because the mean of its divisors is an integer number (30360327302736).

Almost surely, 2^{111321200110021} is an apocalyptic number.

111321200110021 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

111321200110021 is a deficient number, since it is larger than the sum of its proper divisors (10120109100923).

111321200110021 is a wasteful number, since it uses less digits than its factorization.

111321200110021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10120109100922.

The product of its (nonzero) digits is 24, while the sum is 16.

Adding to 111321200110021 its reverse (120011002123111), we get a palindrome (231332202233132).

The spelling of 111321200110021 in words is "one hundred eleven trillion, three hundred twenty-one billion, two hundred million, one hundred ten thousand, twenty-one".