221000002102220 has 48 divisors (see below), whose sum is σ = 536072732381088. Its totient is φ = 75636364354560.

The previous prime is 221000002102211. The next prime is 221000002102223. The reversal of 221000002102220 is 22201200000122.

It is a junction number, because it is equal to n+sod(n) for n = 221000002102195 and 221000002102204.

It is not an unprimeable number, because it can be changed into a prime (221000002102223) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 29545451087 + ... + 29545458566.

It is an arithmetic number, because the mean of its divisors is an integer number (11168181924606).

Almost surely, 2^{221000002102220} is an apocalyptic number.

221000002102220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

221000002102220 is an abundant number, since it is smaller than the sum of its proper divisors (315072730278868).

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

221000002102220 is a wasteful number, since it uses less digits than its factorization.

221000002102220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 59090909690 (or 59090909688 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 14.

Adding to 221000002102220 its reverse (22201200000122), we get a palindrome (243201202102342).

The spelling of 221000002102220 in words is "two hundred twenty-one trillion, two million, one hundred two thousand, two hundred twenty".