220200010001221 has 4 divisors (see below), whose sum is σ = 222257954020032. Its totient is φ = 218142065982412.

The previous prime is 220200010001219. The next prime is 220200010001299. The reversal of 220200010001221 is 122100010002022.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 220200010001221 - 2¹ = 220200010001219 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (220200010071221) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1028972009245 + ... + 1028972009458.

It is an arithmetic number, because the mean of its divisors is an integer number (55564488505008).

Almost surely, 2^{220200010001221} is an apocalyptic number.

It is an amenable number.

220200010001221 is a deficient number, since it is larger than the sum of its proper divisors (2057944018811).

220200010001221 is a wasteful number, since it uses less digits than its factorization.

220200010001221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2057944018810.

The product of its (nonzero) digits is 32, while the sum is 13.

Adding to 220200010001221 its reverse (122100010002022), we get a palindrome (342300020003243).

The spelling of 220200010001221 in words is "two hundred twenty trillion, two hundred billion, ten million, one thousand, two hundred twenty-one".