1231322310020 has 48 divisors (see below), whose sum is σ = 2843058935808. Its totient is φ = 444227938560.

The previous prime is 1231322310019. The next prime is 1231322310067. The reversal of 1231322310020 is 200132231321.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a junction number, because it is equal to n+sod(n) for n = 1231322309974 and 1231322310001.

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, 22007177 + ... + 22063056.

It is an arithmetic number, because the mean of its divisors is an integer number (59230394496).

Almost surely, 2^{1231322310020} is an apocalyptic number.

1231322310020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1231322310020 is an abundant number, since it is smaller than the sum of its proper divisors (1611736625788).

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

1231322310020 is a wasteful number, since it uses less digits than its factorization.

1231322310020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 44070380 (or 44070378 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 20.

Adding to 1231322310020 its reverse (200132231321), we get a palindrome (1431454541341).

The spelling of 1231322310020 in words is "one trillion, two hundred thirty-one billion, three hundred twenty-two million, three hundred ten thousand, twenty".