1131021340 has 12 divisors (see below), whose sum is σ = 2375144856. Its totient is φ = 452408528.

The previous prime is 1131021337. The next prime is 1131021349. The reversal of 1131021340 is 431201311.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1131021349) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 28275514 + ... + 28275553.

It is an arithmetic number, because the mean of its divisors is an integer number (197928738).

Almost surely, 2^1131021340 is an apocalyptic number.

1131021340 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1131021340 is an abundant number, since it is smaller than the sum of its proper divisors (1244123516).

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

1131021340 is a wasteful number, since it uses less digits than its factorization.

1131021340 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 56551076 (or 56551074 counting only the distinct ones).

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

The square root of 1131021340 is about 33630.6607131052. The cubic root of 1131021340 is about 1041.8941504099.

Adding to 1131021340 its reverse (431201311), we get a palindrome (1562222651).

The spelling of 1131021340 in words is "one billion, one hundred thirty-one million, twenty-one thousand, three hundred forty".