1020111300 has 144 divisors (see below), whose sum is σ = 3531857280. Its totient is φ = 251095680.

The previous prime is 1020111293. The next prime is 1020111329. The reversal of 1020111300 is 31110201.

It is a Harshad number since it is a multiple of its sum of digits (9).

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 20569 + ... + 49631.

Almost surely, 2^1020111300 is an apocalyptic number.

1020111300 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 1020111300, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1765928640).

1020111300 is an abundant number, since it is smaller than the sum of its proper divisors (2511745980).

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

1020111300 is a wasteful number, since it uses less digits than its factorization.

1020111300 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29099 (or 29086 counting only the distinct ones).

The product of its (nonzero) digits is 6, while the sum is 9.

The square root of 1020111300 is about 31939.1812669016. The cubic root of 1020111300 is about 1006.6593216623.

Adding to 1020111300 its reverse (31110201), we get a palindrome (1051221501).

The spelling of 1020111300 in words is "one billion, twenty million, one hundred eleven thousand, three hundred".