221022201221020 has 12 divisors (see below), whose sum is σ = 464146622564184. Its totient is φ = 88408880488400.

The previous prime is 221022201220981. The next prime is 221022201221027. The reversal of 221022201221020 is 20122102220122.

221022201221020 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221022201221027) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5525555030506 + ... + 5525555030545.

It is an arithmetic number, because the mean of its divisors is an integer number (38678885213682).

Almost surely, 2^{221022201221020} is an apocalyptic number.

221022201221020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

221022201221020 is an abundant number, since it is smaller than the sum of its proper divisors (243124421343164).

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

221022201221020 is a wasteful number, since it uses less digits than its factorization.

221022201221020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11051110061060 (or 11051110061058 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 19.

Adding to 221022201221020 its reverse (20122102220122), we get a palindrome (241144303441142).

The spelling of 221022201221020 in words is "two hundred twenty-one trillion, twenty-two billion, two hundred one million, two hundred twenty-one thousand, twenty".