10222121220 has 96 divisors (see below), whose sum is σ = 30177100800. Its totient is φ = 2578253184.

The previous prime is 10222121213. The next prime is 10222121237. The reversal of 10222121220 is 2212122201.

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 10222121220.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 730651 + ... + 744509.

It is an arithmetic number, because the mean of its divisors is an integer number (314344800).

Almost surely, 2^10222121220 is an apocalyptic number.

10222121220 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 10222121220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (15088550400).

10222121220 is an abundant number, since it is smaller than the sum of its proper divisors (19954979580).

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

10222121220 is a wasteful number, since it uses less digits than its factorization.

10222121220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14537 (or 14535 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 15.

Adding to 10222121220 its reverse (2212122201), we get a palindrome (12434243421).

The spelling of 10222121220 in words is "ten billion, two hundred twenty-two million, one hundred twenty-one thousand, two hundred twenty".