111020120221 has 4 divisors (see below), whose sum is σ = 111069094752. Its totient is φ = 110971145692.

The previous prime is 111020120207. The next prime is 111020120243. The reversal of 111020120221 is 122021020111.

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, and also an emirpimes, since its reverse is a distinct semiprime: 122021020111 = 89821 ⋅1358491.

It is a cyclic number.

It is not a de Polignac number, because 111020120221 - 2¹⁹ = 111019595933 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 (111020120291) 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, 24483865 + ... + 24488398.

It is an arithmetic number, because the mean of its divisors is an integer number (27767273688).

Almost surely, 2^111020120221 is an apocalyptic number.

It is an amenable number.

111020120221 is a deficient number, since it is larger than the sum of its proper divisors (48974531).

111020120221 is an equidigital number, since it uses as much as digits as its factorization.

111020120221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 48974530.

The product of its (nonzero) digits is 16, while the sum is 13.

Adding to 111020120221 its reverse (122021020111), we get a palindrome (233041140332).

The spelling of 111020120221 in words is "one hundred eleven billion, twenty million, one hundred twenty thousand, two hundred twenty-one".