10320121220 has 72 divisors (see below), whose sum is σ = 22324196160. Its totient is φ = 4006685760.

The previous prime is 10320121213. The next prime is 10320121243. The reversal of 10320121220 is 2212102301.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 10320121195 and 10320121204.

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 23 ways as a sum of consecutive naturals, for example, 6373571 + ... + 6375189.

It is an arithmetic number, because the mean of its divisors is an integer number (310058280).

Almost surely, 2^10320121220 is an apocalyptic number.

10320121220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

10320121220 is an abundant number, since it is smaller than the sum of its proper divisors (12004074940).

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

10320121220 is a wasteful number, since it uses less digits than its factorization.

10320121220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1833 (or 1764 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 14.

Adding to 10320121220 its reverse (2212102301), we get a palindrome (12532223521).

It can be divided in two parts, 103201 and 21220, that added together give a palindrome (124421).

The spelling of 10320121220 in words is "ten billion, three hundred twenty million, one hundred twenty-one thousand, two hundred twenty".