221020101210210 has 128 divisors (see below), whose sum is σ = 561953372682240. Its totient is φ = 55441863207936.

The previous prime is 221020101210047. The next prime is 221020101210229. The reversal of 221020101210210 is 12012101020122.

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 221020101210210.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 12641992129 + ... + 12642009611.

It is an arithmetic number, because the mean of its divisors is an integer number (4390260724080).

Almost surely, 2^{221020101210210} is an apocalyptic number.

221020101210210 is an abundant number, since it is smaller than the sum of its proper divisors (340933271472030).

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

221020101210210 is a wasteful number, since it uses less digits than its factorization.

221020101210210 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29432.

The product of its (nonzero) digits is 32, while the sum is 15.

Adding to 221020101210210 its reverse (12012101020122), we get a palindrome (233032202230332).

The spelling of 221020101210210 in words is "two hundred twenty-one trillion, twenty billion, one hundred one million, two hundred ten thousand, two hundred ten".