221020122110200 has 96 divisors (see below), whose sum is σ = 618191619811200. Its totient is φ = 71789994541440.

The previous prime is 221020122110171. The next prime is 221020122110201. The reversal of 221020122110200 is 2011221020122.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221020122110201) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 4154486974 + ... + 4154540173.

It is an arithmetic number, because the mean of its divisors is an integer number (6439496039700).

Almost surely, 2^{221020122110200} is an apocalyptic number.

221020122110200 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

221020122110200 is an abundant number, since it is smaller than the sum of its proper divisors (397171497701000).

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

221020122110200 is a wasteful number, since it uses less digits than its factorization.

221020122110200 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8309027189 (or 8309027180 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 16.

Adding to 221020122110200 its reverse (2011221020122), we get a palindrome (223031343130322).

The spelling of 221020122110200 in words is "two hundred twenty-one trillion, twenty billion, one hundred twenty-two million, one hundred ten thousand, two hundred".