1131321320020 has 48 divisors (see below), whose sum is σ = 2431909041408. Its totient is φ = 441843937920.

The previous prime is 1131321320009. The next prime is 1131321320021. The reversal of 1131321320020 is 200231231311.

It is a self number, because there is not a number n which added to its sum of digits gives 1131321320020.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1131321320021) 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, 2141910 + ... + 2617330.

It is an arithmetic number, because the mean of its divisors is an integer number (50664771696).

Almost surely, 2^{1131321320020} is an apocalyptic number.

1131321320020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1131321320020 is an abundant number, since it is smaller than the sum of its proper divisors (1300587721388).

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

1131321320020 is a wasteful number, since it uses less digits than its factorization.

1131321320020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 478240 (or 478238 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 19.

Adding to 1131321320020 its reverse (200231231311), we get a palindrome (1331552551331).

The spelling of 1131321320020 in words is "one trillion, one hundred thirty-one billion, three hundred twenty-one million, three hundred twenty thousand, twenty".