1231321030 has 16 divisors (see below), whose sum is σ = 2333029680. Its totient is φ = 466605792.

The previous prime is 1231321001. The next prime is 1231321043. The reversal of 1231321030 is 301231321.

It is a nialpdrome in base 14.

It is a junction number, because it is equal to n+sod(n) for n = 1231320995 and 1231321013.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3240129 + ... + 3240508.

It is an arithmetic number, because the mean of its divisors is an integer number (145814355).

Almost surely, 2^1231321030 is an apocalyptic number.

1231321030 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1231321030 is a deficient number, since it is larger than the sum of its proper divisors (1101708650).

1231321030 is a wasteful number, since it uses less digits than its factorization.

1231321030 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6480663.

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

The square root of 1231321030 is about 35090.1842400407. The cubic root of 1231321030 is about 1071.8247113286.

Adding to 1231321030 its reverse (301231321), we get a palindrome (1532552351).

The spelling of 1231321030 in words is "one billion, two hundred thirty-one million, three hundred twenty-one thousand, thirty".