1312231104 has 84 divisors (see below), whose sum is σ = 3900626184. Its totient is φ = 437405184.

The previous prime is 1312231103. The next prime is 1312231253. The reversal of 1312231104 is 4011322131.

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

It is not an unprimeable number, because it can be changed into a prime (1312231103) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 26637 + ... + 57740.

It is an arithmetic number, because the mean of its divisors is an integer number (46436026).

Almost surely, 2^1312231104 is an apocalyptic number.

It is an amenable number.

1312231104 is an abundant number, since it is smaller than the sum of its proper divisors (2588395080).

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

1312231104 is an frugal number, since it uses more digits than its factorization.

1312231104 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 84404 (or 84382 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 18.

The square root of 1312231104 is about 36224.7305580042. The cubic root of 1312231104 is about 1094.8050093777.

Adding to 1312231104 its reverse (4011322131), we get a palindrome (5323553235).

The spelling of 1312231104 in words is "one billion, three hundred twelve million, two hundred thirty-one thousand, one hundred four".