1021131340 has 24 divisors (see below), whose sum is σ = 2145164112. Its totient is φ = 408302400.

The previous prime is 1021131323. The next prime is 1021131361. The reversal of 1021131340 is 431311201.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 58287 + ... + 73753.

It is an arithmetic number, because the mean of its divisors is an integer number (89381838).

Almost surely, 2^1021131340 is an apocalyptic number.

1021131340 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1021131340 is an abundant number, since it is smaller than the sum of its proper divisors (1124032772).

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

1021131340 is a wasteful number, since it uses less digits than its factorization.

1021131340 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18777 (or 18775 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 16.

The square root of 1021131340 is about 31955.1457515061. The cubic root of 1021131340 is about 1006.9947395430.

Adding to 1021131340 its reverse (431311201), we get a palindrome (1452442541).

The spelling of 1021131340 in words is "one billion, twenty-one million, one hundred thirty-one thousand, three hundred forty".