10320121020 has 96 divisors (see below), whose sum is σ = 31649377536. Its totient is φ = 2491840000.

The previous prime is 10320120991. The next prime is 10320121037. The reversal of 10320121020 is 2012102301.

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 = 10320120987 and 10320121005.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 134512 + ... + 196808.

It is an arithmetic number, because the mean of its divisors is an integer number (329681016).

Almost surely, 2^10320121020 is an apocalyptic number.

10320121020 is a gapful number since it is divisible by the number (10) 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 10320121020, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (15824688768).

10320121020 is an abundant number, since it is smaller than the sum of its proper divisors (21329256516).

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

10320121020 is a wasteful number, since it uses less digits than its factorization.

10320121020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 62571 (or 62569 counting only the distinct ones).

The product of its (nonzero) digits is 24, while the sum is 12.

Adding to 10320121020 its reverse (2012102301), we get a palindrome (12332223321).

The spelling of 10320121020 in words is "ten billion, three hundred twenty million, one hundred twenty-one thousand, twenty".