1131223221320 has 64 divisors (see below), whose sum is σ = 2681813404800. Its totient is φ = 428257981440.

The previous prime is 1131223221313. The next prime is 1131223221341. The reversal of 1131223221320 is 231223221311.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 61712 + ... + 1505408.

It is an arithmetic number, because the mean of its divisors is an integer number (41903334450).

Almost surely, 2^{1131223221320} is an apocalyptic number.

1131223221320 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 1131223221320, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1340906702400).

1131223221320 is an abundant number, since it is smaller than the sum of its proper divisors (1550590183480).

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

1131223221320 is a wasteful number, since it uses less digits than its factorization.

1131223221320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1444758 (or 1444754 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 23.

Adding to 1131223221320 its reverse (231223221311), we get a palindrome (1362446442631).

Subtracting from 1131223221320 its reverse (231223221311), we obtain a palindrome (900000000009).

The spelling of 1131223221320 in words is "one trillion, one hundred thirty-one billion, two hundred twenty-three million, two hundred twenty-one thousand, three hundred twenty".