1231230220 has 48 divisors (see below), whose sum is σ = 2824744608. Its totient is φ = 447068160.

The previous prime is 1231230211. The next prime is 1231230263. The reversal of 1231230220 is 220321321.

It is a junction number, because it is equal to n+sod(n) for n = 1231230194 and 1231230203.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 162844 + ... + 170236.

It is an arithmetic number, because the mean of its divisors is an integer number (58848846).

Almost surely, 2^1231230220 is an apocalyptic number.

1231230220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1231230220 is an abundant number, since it is smaller than the sum of its proper divisors (1593514388).

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

1231230220 is a wasteful number, since it uses less digits than its factorization.

1231230220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8170 (or 8168 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 16.

The square root of 1231230220 is about 35088.8902645837. The cubic root of 1231230220 is about 1071.7983616351.

Adding to 1231230220 its reverse (220321321), we get a palindrome (1451551541).

The spelling of 1231230220 in words is "one billion, two hundred thirty-one million, two hundred thirty thousand, two hundred twenty".