1231103320 has 16 divisors (see below), whose sum is σ = 2769982560. Its totient is φ = 492441312.

The previous prime is 1231103311. The next prime is 1231103417. The reversal of 1231103320 is 233011321.

It is a junction number, because it is equal to n+sod(n) for n = 1231103294 and 1231103303.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 15388752 + ... + 15388831.

It is an arithmetic number, because the mean of its divisors is an integer number (173123910).

Almost surely, 2^1231103320 is an apocalyptic number.

1231103320 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1231103320 is an abundant number, since it is smaller than the sum of its proper divisors (1538879240).

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

1231103320 is a wasteful number, since it uses less digits than its factorization.

1231103320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30777594 (or 30777590 counting only the distinct ones).

The product of its (nonzero) digits is 108, while the sum is 16.

The square root of 1231103320 is about 35087.0819533343. The cubic root of 1231103320 is about 1071.7615377921.

Adding to 1231103320 its reverse (233011321), we get a palindrome (1464114641).

The spelling of 1231103320 in words is "one billion, two hundred thirty-one million, one hundred three thousand, three hundred twenty".