221020211022 has 64 divisors (see below), whose sum is σ = 480716544000. Its totient is φ = 67339444608.

The previous prime is 221020211017. The next prime is 221020211063. The reversal of 221020211022 is 220112020122.

It is a junction number, because it is equal to n+sod(n) for n = 221020210992 and 221020211010.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 14947629 + ... + 14962407.

It is an arithmetic number, because the mean of its divisors is an integer number (7511196000).

Almost surely, 2^221020211022 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 221020211022, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (240358272000).

221020211022 is an abundant number, since it is smaller than the sum of its proper divisors (259696332978).

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

221020211022 is a wasteful number, since it uses less digits than its factorization.

221020211022 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16665.

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

Adding to 221020211022 its reverse (220112020122), we get a palindrome (441132231144).

The spelling of 221020211022 in words is "two hundred twenty-one billion, twenty million, two hundred eleven thousand, twenty-two".