221022012210 has 64 divisors (see below), whose sum is σ = 539980922880. Its totient is φ = 57888342720.

The previous prime is 221022012179. The next prime is 221022012257. The reversal of 221022012210 is 12210220122.

221022012210 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 221022012210.

It is an unprimeable number.

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 31 ways as a sum of consecutive naturals, for example, 208539 + ... + 696801.

It is an arithmetic number, because the mean of its divisors is an integer number (8437201920).

Almost surely, 2^221022012210 is an apocalyptic number.

221022012210 is an abundant number, since it is smaller than the sum of its proper divisors (318958910670).

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

221022012210 is a wasteful number, since it uses less digits than its factorization.

221022012210 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 488543.

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

Adding to 221022012210 its reverse (12210220122), we get a palindrome (233232232332).

The spelling of 221022012210 in words is "two hundred twenty-one billion, twenty-two million, twelve thousand, two hundred ten".