1103131231321 has 16 divisors (see below), whose sum is σ = 1268234602240. Its totient is φ = 939919256640.

The previous prime is 1103131231309. The next prime is 1103131231331. The reversal of 1103131231321 is 1231321313011.

It is not a de Polignac number, because 1103131231321 - 2⁵ = 1103131231289 is a prime.

It is a super-2 number, since 2×1103131231321² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1103131231292 and 1103131231301.

It is not an unprimeable number, because it can be changed into a prime (1103131231331) 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, 466195 + ... + 1556791.

It is an arithmetic number, because the mean of its divisors is an integer number (79264662640).

Almost surely, 2^{1103131231321} is an apocalyptic number.

It is an amenable number.

1103131231321 is a deficient number, since it is larger than the sum of its proper divisors (165103370919).

1103131231321 is a wasteful number, since it uses less digits than its factorization.

1103131231321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1091464.

The product of its (nonzero) digits is 324, while the sum is 22.

Adding to 1103131231321 its reverse (1231321313011), we get a palindrome (2334452544332).

The spelling of 1103131231321 in words is "one trillion, one hundred three billion, one hundred thirty-one million, two hundred thirty-one thousand, three hundred twenty-one".