221002110020 has 24 divisors (see below), whose sum is σ = 464302273344. Its totient is φ = 88363159776.

The previous prime is 221002109953. The next prime is 221002110053. The reversal of 221002110020 is 20011200122.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 221002109983 and 221002110010.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2307152 + ... + 2401031.

It is an arithmetic number, because the mean of its divisors is an integer number (19345928056).

Almost surely, 2^221002110020 is an apocalyptic number.

221002110020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

221002110020 is an abundant number, since it is smaller than the sum of its proper divisors (243300163324).

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

221002110020 is a wasteful number, since it uses less digits than its factorization.

221002110020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4710539 (or 4710537 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 11.

Adding to 221002110020 its reverse (20011200122), we get a palindrome (241013310142).

The spelling of 221002110020 in words is "two hundred twenty-one billion, two million, one hundred ten thousand, twenty".