221000020443020 has 96 divisors (see below), whose sum is σ = 584483775203328. Its totient is φ = 68316285364992.

The previous prime is 221000020442951. The next prime is 221000020443031. The reversal of 221000020443020 is 20344020000122.

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 = 221000020442983 and 221000020443001.

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, 1411882004 + ... + 1412038523.

It is an arithmetic number, because the mean of its divisors is an integer number (6088372658368).

Almost surely, 2^{221000020443020} is an apocalyptic number.

221000020443020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

221000020443020 is an abundant number, since it is smaller than the sum of its proper divisors (363483754760308).

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

221000020443020 is a wasteful number, since it uses less digits than its factorization.

221000020443020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2823920599 (or 2823920597 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 20.

Adding to 221000020443020 its reverse (20344020000122), we get a palindrome (241344040443142).

The spelling of 221000020443020 in words is "two hundred twenty-one trillion, twenty million, four hundred forty-three thousand, twenty".