10321121220 has 48 divisors (see below), whose sum is σ = 28910454720. Its totient is φ = 2751221376.

The previous prime is 10321121201. The next prime is 10321121221. The reversal of 10321121220 is 2212112301.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a self number, because there is not a number n which added to its sum of digits gives 10321121220.

It is not an unprimeable number, because it can be changed into a prime (10321121221) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 127194 + ... + 191886.

It is an arithmetic number, because the mean of its divisors is an integer number (602301140).

Almost surely, 2^10321121220 is an apocalyptic number.

10321121220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

10321121220 is an abundant number, since it is smaller than the sum of its proper divisors (18589333500).

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

10321121220 is a wasteful number, since it uses less digits than its factorization.

10321121220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 67364 (or 67362 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 15.

Adding to 10321121220 its reverse (2212112301), we get a palindrome (12533233521).

The spelling of 10321121220 in words is "ten billion, three hundred twenty-one million, one hundred twenty-one thousand, two hundred twenty".