221222200020 has 24 divisors (see below), whose sum is σ = 619422160224. Its totient is φ = 58992586656.

The previous prime is 221222199997. The next prime is 221222200037. The reversal of 221222200020 is 20002222122.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a congruent number.

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, 1843518274 + ... + 1843518393.

It is an arithmetic number, because the mean of its divisors is an integer number (25809256676).

Almost surely, 2^221222200020 is an apocalyptic number.

221222200020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

221222200020 is an abundant number, since it is smaller than the sum of its proper divisors (398199960204).

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

221222200020 is a wasteful number, since it uses less digits than its factorization.

221222200020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3687036679 (or 3687036677 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 15.

Adding to 221222200020 its reverse (20002222122), we get a palindrome (241224422142).

The spelling of 221222200020 in words is "two hundred twenty-one billion, two hundred twenty-two million, two hundred thousand, twenty".