111020323221 has 32 divisors (see below), whose sum is σ = 166158195840. Its totient is φ = 73256400000.

The previous prime is 111020323181. The next prime is 111020323247. The reversal of 111020323221 is 122323020111.

It is not a de Polignac number, because 111020323221 - 2¹⁵ = 111020290453 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 111020323194 and 111020323203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (111020323021) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 12329721 + ... + 12338721.

It is an arithmetic number, because the mean of its divisors is an integer number (5192443620).

Almost surely, 2^111020323221 is an apocalyptic number.

It is an amenable number.

111020323221 is a deficient number, since it is larger than the sum of its proper divisors (55137872619).

111020323221 is a wasteful number, since it uses less digits than its factorization.

111020323221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13634 (or 13628 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 18.

Adding to 111020323221 its reverse (122323020111), we get a palindrome (233343343332).

The spelling of 111020323221 in words is "one hundred eleven billion, twenty million, three hundred twenty-three thousand, two hundred twenty-one".