221102120020 has 48 divisors (see below), whose sum is σ = 492636936960. Its totient is φ = 83067462144.

The previous prime is 221102119999. The next prime is 221102120021. The reversal of 221102120020 is 20021201122.

It is a happy number.

221102120020 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×221102120020² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221102120021) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 502080 + ... + 833239.

It is an arithmetic number, because the mean of its divisors is an integer number (10263269520).

Almost surely, 2^221102120020 is an apocalyptic number.

221102120020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

221102120020 is an abundant number, since it is smaller than the sum of its proper divisors (271534816940).

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

221102120020 is a wasteful number, since it uses less digits than its factorization.

221102120020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1335832 (or 1335830 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 13.

Adding to 221102120020 its reverse (20021201122), we get a palindrome (241123321142).

The spelling of 221102120020 in words is "two hundred twenty-one billion, one hundred two million, one hundred twenty thousand, twenty".