111242200445021 has 4 divisors (see below), whose sum is σ = 111260145636000. Its totient is φ = 111224255254044.

The previous prime is 111242200444961. The next prime is 111242200445023. The reversal of 111242200445021 is 120544002242111.

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 111242200445021 - 2¹⁸ = 111242200182877 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (111242200445023) 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, 8972586191 + ... + 8972598588.

It is an arithmetic number, because the mean of its divisors is an integer number (27815036409000).

Almost surely, 2^{111242200445021} is an apocalyptic number.

It is an amenable number.

111242200445021 is a deficient number, since it is larger than the sum of its proper divisors (17945190979).

111242200445021 is an equidigital number, since it uses as much as digits as its factorization.

111242200445021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17945190978.

The product of its (nonzero) digits is 5120, while the sum is 29.

Adding to 111242200445021 its reverse (120544002242111), we get a palindrome (231786202687132).

The spelling of 111242200445021 in words is "one hundred eleven trillion, two hundred forty-two billion, two hundred million, four hundred forty-five thousand, twenty-one".