1021131300 has 144 divisors (see below), whose sum is σ = 3423308672. Its totient is φ = 230169600.

The previous prime is 1021131283. The next prime is 1021131323. The reversal of 1021131300 is 31311201.

It is a Harshad number since it is a multiple of its sum of digits (12).

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, 149970 + ... + 156630.

Almost surely, 2^1021131300 is an apocalyptic number.

1021131300 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 1021131300, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1711654336).

1021131300 is an abundant number, since it is smaller than the sum of its proper divisors (2402177372).

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

1021131300 is a wasteful number, since it uses less digits than its factorization.

1021131300 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6758 (or 6751 counting only the distinct ones).

The product of its (nonzero) digits is 18, while the sum is 12.

The square root of 1021131300 is about 31955.1451256288. The cubic root of 1021131300 is about 1006.9947263942.

Adding to 1021131300 its reverse (31311201), we get a palindrome (1052442501).

The spelling of 1021131300 in words is "one billion, twenty-one million, one hundred thirty-one thousand, three hundred".