1231320130 has 16 divisors (see below), whose sum is σ = 2218015224. Its totient is φ = 492163840.

The previous prime is 1231320107. The next prime is 1231320161. The reversal of 1231320130 is 310231321.

It can be written as a sum of positive squares in 4 ways, for example, as 1227591369 + 3728761 = 35037^2 + 1931^2 .

It is a super-2 number, since 2×1231320130² = 3032298525086433800, which contains 22 as substring.

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, 31111 + ... + 58570.

Almost surely, 2^1231320130 is an apocalyptic number.

1231320130 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1231320130 is a deficient number, since it is larger than the sum of its proper divisors (986695094).

1231320130 is a wasteful number, since it uses less digits than its factorization.

1231320130 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 91061.

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

The square root of 1231320130 is about 35090.1714159393. The cubic root of 1231320130 is about 1071.8244501883.

Adding to 1231320130 its reverse (310231321), we get a palindrome (1541551451).

The spelling of 1231320130 in words is "one billion, two hundred thirty-one million, three hundred twenty thousand, one hundred thirty".