1101311221320 has 96 divisors (see below), whose sum is σ = 3579405635520. Its totient is φ = 293671163520.

The previous prime is 1101311221189. The next prime is 1101311221321. The reversal of 1101311221320 is 231221131011.

1101311221320 is a `hidden beast` number, since 1 + 10 + 1 + 311 + 2 + 21 + 320 = 666.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 1101311221293 and 1101311221302.

It is not an unprimeable number, because it can be changed into a prime (1101311221321) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 12365187 + ... + 12453933.

It is an arithmetic number, because the mean of its divisors is an integer number (37285475370).

Almost surely, 2^{1101311221320} is an apocalyptic number.

1101311221320 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1101311221320 is an abundant number, since it is smaller than the sum of its proper divisors (2478094414200).

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

1101311221320 is a wasteful number, since it uses less digits than its factorization.

1101311221320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 123235 (or 123228 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 18.

Adding to 1101311221320 its reverse (231221131011), we get a palindrome (1332532352331).

The spelling of 1101311221320 in words is "one trillion, one hundred one billion, three hundred eleven million, two hundred twenty-one thousand, three hundred twenty".