221000001022020 has 96 divisors (see below), whose sum is σ = 675175515670656. Its totient is φ = 53566157260800.

The previous prime is 221000001021979. The next prime is 221000001022037. The reversal of 221000001022020 is 20220100000122.

It is a Harshad number since it is a multiple of its sum of digits (12).

It is a junction number, because it is equal to n+sod(n) for n = 221000001021987 and 221000001022005.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 26315509 + ... + 33682428.

It is an arithmetic number, because the mean of its divisors is an integer number (7033078288236).

Almost surely, 2^{221000001022020} is an apocalyptic number.

221000001022020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

221000001022020 is an abundant number, since it is smaller than the sum of its proper divisors (454175514648636).

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

221000001022020 is a wasteful number, since it uses less digits than its factorization.

221000001022020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 60003541 (or 60003539 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 12.

Adding to 221000001022020 its reverse (20220100000122), we get a palindrome (241220101022142).

The spelling of 221000001022020 in words is "two hundred twenty-one trillion, one million, twenty-two thousand, twenty".