1231300020 has 48 divisors (see below), whose sum is σ = 3489192000. Its totient is φ = 324389376.

The previous prime is 1231300019. The next prime is 1231300043. The reversal of 1231300020 is 200031321.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (12).

It is a junction number, because it is equal to n+sod(n) for n = 1231299969 and 1231300005.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 118645 + ... + 128604.

It is an arithmetic number, because the mean of its divisors is an integer number (72691500).

Almost surely, 2^1231300020 is an apocalyptic number.

1231300020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1231300020 is an abundant number, since it is smaller than the sum of its proper divisors (2257891980).

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

1231300020 is a wasteful number, since it uses less digits than its factorization.

1231300020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 247344 (or 247342 counting only the distinct ones).

The product of its (nonzero) digits is 36, while the sum is 12.

The square root of 1231300020 is about 35089.8848672947. The cubic root of 1231300020 is about 1071.8186151211.

Adding to 1231300020 its reverse (200031321), we get a palindrome (1431331341).

The spelling of 1231300020 in words is "one billion, two hundred thirty-one million, three hundred thousand, twenty".