221202201220220 has 24 divisors (see below), whose sum is σ = 506754133705008. Its totient is φ = 80437164080000.

The previous prime is 221202201220183. The next prime is 221202201220237. The reversal of 221202201220220 is 22022102202122.

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 = 221202201220192 and 221202201220201.

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, 502732275281 + ... + 502732275720.

It is an arithmetic number, because the mean of its divisors is an integer number (21114755571042).

Almost surely, 2^{221202201220220} is an apocalyptic number.

221202201220220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

221202201220220 is an abundant number, since it is smaller than the sum of its proper divisors (285551932484788).

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

221202201220220 is a wasteful number, since it uses less digits than its factorization.

221202201220220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1005464551021 (or 1005464551019 counting only the distinct ones).

The product of its (nonzero) digits is 512, while the sum is 20.

Adding to 221202201220220 its reverse (22022102202122), we get a palindrome (243224303422342).

The spelling of 221202201220220 in words is "two hundred twenty-one trillion, two hundred two billion, two hundred one million, two hundred twenty thousand, two hundred twenty".