221002012022220 has 144 divisors (see below), whose sum is σ = 787570806570912. Its totient is φ = 49454995691520.

The previous prime is 221002012022213. The next prime is 221002012022237. The reversal of 221002012022220 is 22220210200122.

221002012022220 is a `hidden beast` number, since 221 + 0 + 0 + 20 + 1 + 202 + 2 + 220 = 666.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 221002012022193 and 221002012022202.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 4292942637 + ... + 4292994116.

It is an arithmetic number, because the mean of its divisors is an integer number (5469241712298).

Almost surely, 2^{221002012022220} is an apocalyptic number.

221002012022220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

221002012022220 is an abundant number, since it is smaller than the sum of its proper divisors (566568794548692).

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

221002012022220 is a wasteful number, since it uses less digits than its factorization.

221002012022220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8585936792 (or 8585936787 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 18.

Adding to 221002012022220 its reverse (22220210200122), we get a palindrome (243222222222342).

The spelling of 221002012022220 in words is "two hundred twenty-one trillion, two billion, twelve million, twenty-two thousand, two hundred twenty".