221020202201112 has 128 divisors (see below), whose sum is σ = 640790174016000. Its totient is φ = 70453499656320.

The previous prime is 221020202201087. The next prime is 221020202201131. The reversal of 221020202201112 is 211102202020122.

It is a happy number.

221020202201112 is a `hidden beast` number, since 221 + 0 + 202 + 0 + 220 + 11 + 12 = 666.

It is a Harshad number since it is a multiple of its sum of digits (18).

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, 15687562 + ... + 26232422.

It is an arithmetic number, because the mean of its divisors is an integer number (5006173234500).

Almost surely, 2^{221020202201112} is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 221020202201112, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (320395087008000).

221020202201112 is an abundant number, since it is smaller than the sum of its proper divisors (419769971814888).

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

221020202201112 is a wasteful number, since it uses less digits than its factorization.

221020202201112 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10549118 (or 10549108 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 18.

Adding to 221020202201112 its reverse (211102202020122), we get a palindrome (432122404221234).

The spelling of 221020202201112 in words is "two hundred twenty-one trillion, twenty billion, two hundred two million, two hundred one thousand, one hundred twelve".