111021103320 has 128 divisors (see below), whose sum is σ = 345093704640. Its totient is φ = 28550430720.

The previous prime is 111021103313. The next prime is 111021103327. The reversal of 111021103320 is 23301120111.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (111021103313) and next prime (111021103327).

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a self number, because there is not a number n which added to its sum of digits gives 111021103320.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (111021103327) 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, 391080 + ... + 612360.

Almost surely, 2^111021103320 is an apocalyptic number.

111021103320 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 111021103320, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (172546852320).

111021103320 is an abundant number, since it is smaller than the sum of its proper divisors (234072601320).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

111021103320 is a wasteful number, since it uses less digits than its factorization.

111021103320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 221445 (or 221441 counting only the distinct ones).

The product of its (nonzero) digits is 36, while the sum is 15.

Adding to 111021103320 its reverse (23301120111), we get a palindrome (134322223431).

The spelling of 111021103320 in words is "one hundred eleven billion, twenty-one million, one hundred three thousand, three hundred twenty".