1020111040 has 112 divisors (see below), whose sum is σ = 2633289120. Its totient is φ = 376396800.

The previous prime is 1020111013. The next prime is 1020111041. The reversal of 1020111040 is 401110201.

It is a Harshad number since it is a multiple of its sum of digits (10).

It is not an unprimeable number, because it can be changed into a prime (1020111041) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 702315 + ... + 703765.

It is an arithmetic number, because the mean of its divisors is an integer number (23511510).

Almost surely, 2^1020111040 is an apocalyptic number.

1020111040 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 1020111040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1316644560).

1020111040 is an abundant number, since it is smaller than the sum of its proper divisors (1613178080).

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

1020111040 is an equidigital number, since it uses as much as digits as its factorization.

1020111040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1507 (or 1471 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 10.

The square root of 1020111040 is about 31939.1771966655. The cubic root of 1020111040 is about 1006.6592361385.

Adding to 1020111040 its reverse (401110201), we get a palindrome (1421221241).

The spelling of 1020111040 in words is "one billion, twenty million, one hundred eleven thousand, forty".