111001213220221 has 4 divisors (see below), whose sum is σ = 115827352925472. Its totient is φ = 106175073514972.

The previous prime is 111001213220189. The next prime is 111001213220257. The reversal of 111001213220221 is 122022312100111.

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 111001213220221 - 2⁵ = 111001213220189 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 (111001213224221) 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, 2413069852591 + ... + 2413069852636.

It is an arithmetic number, because the mean of its divisors is an integer number (28956838231368).

Almost surely, 2^{111001213220221} is an apocalyptic number.

It is an amenable number.

111001213220221 is a deficient number, since it is larger than the sum of its proper divisors (4826139705251).

111001213220221 is an equidigital number, since it uses as much as digits as its factorization.

111001213220221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4826139705250.

The product of its (nonzero) digits is 96, while the sum is 19.

Adding to 111001213220221 its reverse (122022312100111), we get a palindrome (233023525320332).

The spelling of 111001213220221 in words is "one hundred eleven trillion, one billion, two hundred thirteen million, two hundred twenty thousand, two hundred twenty-one".