111220301221 has 4 divisors (see below), whose sum is σ = 111221484192. Its totient is φ = 111219118252.

The previous prime is 111220301191. The next prime is 111220301239. The reversal of 111220301221 is 122103022111.

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: 122103022111 = 7 ⋅17443288873.

It is a cyclic number.

It is not a de Polignac number, because 111220301221 - 2¹⁹ = 111219776933 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 111220301195 and 111220301204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (111220301321) 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, 437011 + ... + 642976.

It is an arithmetic number, because the mean of its divisors is an integer number (27805371048).

Almost surely, 2^111220301221 is an apocalyptic number.

It is an amenable number.

111220301221 is a deficient number, since it is larger than the sum of its proper divisors (1182971).

111220301221 is a wasteful number, since it uses less digits than its factorization.

111220301221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1182970.

The product of its (nonzero) digits is 48, while the sum is 16.

Adding to 111220301221 its reverse (122103022111), we get a palindrome (233323323332).

The spelling of 111220301221 in words is "one hundred eleven billion, two hundred twenty million, three hundred one thousand, two hundred twenty-one".