220001221020210 has 128 divisors (see below), whose sum is σ = 606570239176704. Its totient is φ = 50025042305280.

The previous prime is 220001221020169. The next prime is 220001221020211. The reversal of 220001221020210 is 12020122100022.

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 220001221020210.

It is not an unprimeable number, because it can be changed into a prime (220001221020211) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 33708409 + ... + 39702131.

It is an arithmetic number, because the mean of its divisors is an integer number (4738829993568).

Almost surely, 2^{220001221020210} is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 220001221020210, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (303285119588352).

220001221020210 is an abundant number, since it is smaller than the sum of its proper divisors (386569018156494).

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

220001221020210 is a wasteful number, since it uses less digits than its factorization.

220001221020210 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5994648.

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

Adding to 220001221020210 its reverse (12020122100022), we get a palindrome (232021343120232).

The spelling of 220001221020210 in words is "two hundred twenty trillion, one billion, two hundred twenty-one million, twenty thousand, two hundred ten".