1021111344 has 120 divisors (see below), whose sum is σ = 3225128400. Its totient is φ = 298744320.

The previous prime is 1021111327. The next prime is 1021111363. The reversal of 1021111344 is 4431111201.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 34822 + ... + 57050.

It is an arithmetic number, because the mean of its divisors is an integer number (26876070).

Almost surely, 2^1021111344 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1021111344, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1612564200).

1021111344 is an abundant number, since it is smaller than the sum of its proper divisors (2204017056).

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

1021111344 is a wasteful number, since it uses less digits than its factorization.

1021111344 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22283 (or 22274 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 18.

The square root of 1021111344 is about 31954.8328739175. The cubic root of 1021111344 is about 1006.9881664420.

Adding to 1021111344 its reverse (4431111201), we get a palindrome (5452222545).

The spelling of 1021111344 in words is "one billion, twenty-one million, one hundred eleven thousand, three hundred forty-four".