1231001330 has 16 divisors (see below), whose sum is σ = 2386248984. Its totient is φ = 454523520.

The previous prime is 1231001329. The next prime is 1231001333. The reversal of 1231001330 is 331001321.

It can be written as a sum of positive squares in 4 ways, for example, as 853048849 + 377952481 = 29207^2 + 19441^2 .

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (1231001333) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4734491 + ... + 4734750.

Almost surely, 2^1231001330 is an apocalyptic number.

1231001330 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1231001330 is a deficient number, since it is larger than the sum of its proper divisors (1155247654).

1231001330 is a wasteful number, since it uses less digits than its factorization.

1231001330 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9469261.

The product of its (nonzero) digits is 54, while the sum is 14.

The square root of 1231001330 is about 35085.6285393322. The cubic root of 1231001330 is about 1071.7319404989.

Adding to 1231001330 its reverse (331001321), we get a palindrome (1562002651).

Subtracting from 1231001330 its reverse (331001321), we obtain a palindrome (900000009).

The spelling of 1231001330 in words is "one billion, two hundred thirty-one million, one thousand, three hundred thirty".