221310220320020 has 96 divisors (see below), whose sum is σ = 517127327377920. Its totient is φ = 79043564920320.

The previous prime is 221310220320019. The next prime is 221310220320031. The reversal of 221310220320020 is 20023022013122.

It is a happy number.

It is a super-2 number, since 2×221310220320020² (a number of 29 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a junction number, because it is equal to n+sod(n) for n = 221310220319974 and 221310220320001.

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, 112121960 + ... + 114078719.

It is an arithmetic number, because the mean of its divisors is an integer number (5386742993520).

Almost surely, 2^{221310220320020} is an apocalyptic number.

221310220320020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

221310220320020 is an abundant number, since it is smaller than the sum of its proper divisors (295817107057900).

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

221310220320020 is a wasteful number, since it uses less digits than its factorization.

221310220320020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 226200825 (or 226200823 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 20.

Adding to 221310220320020 its reverse (20023022013122), we get a palindrome (241333242333142).

The spelling of 221310220320020 in words is "two hundred twenty-one trillion, three hundred ten billion, two hundred twenty million, three hundred twenty thousand, twenty".