221102200111220 has 48 divisors (see below), whose sum is σ = 473129414685648. Its totient is φ = 86762253527040.

The previous prime is 221102200111207. The next prime is 221102200111241. The reversal of 221102200111220 is 22111002201122.

It can be written as a sum of positive squares in 8 ways, for example, as 48861721693456 + 172240478417764 = 6990116^2 + 13124042^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2666069 + ... + 21196988.

It is an arithmetic number, because the mean of its divisors is an integer number (9856862805951).

Almost surely, 2^{221102200111220} is an apocalyptic number.

221102200111220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

221102200111220 is an abundant number, since it is smaller than the sum of its proper divisors (252027214574428).

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

221102200111220 is a wasteful number, since it uses less digits than its factorization.

221102200111220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23871860 (or 23871858 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 17.

Adding to 221102200111220 its reverse (22111002201122), we get a palindrome (243213202312342).

The spelling of 221102200111220 in words is "two hundred twenty-one trillion, one hundred two billion, two hundred million, one hundred eleven thousand, two hundred twenty".