321203112010020 has 144 divisors (see below), whose sum is σ = 1001006024491200. Its totient is φ = 83309448837888.

The previous prime is 321203112010013. The next prime is 321203112010021. The reversal of 321203112010020 is 20010211302123.

321203112010020 is a `hidden beast` number, since 3 + 212 + 0 + 311 + 20 + 100 + 20 = 666.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 321203112009975 and 321203112010002.

It is not an unprimeable number, because it can be changed into a prime (321203112010021) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 10064931 + ... + 27271029.

Almost surely, 2^{321203112010020} is an apocalyptic number.

321203112010020 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 321203112010020, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (500503012245600).

321203112010020 is an abundant number, since it is smaller than the sum of its proper divisors (679802912481180).

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

321203112010020 is a wasteful number, since it uses less digits than its factorization.

321203112010020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17208954 (or 17208949 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 18.

Adding to 321203112010020 its reverse (20010211302123), we get a palindrome (341213323312143).

The spelling of 321203112010020 in words is "three hundred twenty-one trillion, two hundred three billion, one hundred twelve million, ten thousand, twenty".