1220201200221 has 4 divisors (see below), whose sum is σ = 1626934933632. Its totient is φ = 813467466812.

The previous prime is 1220201200201. The next prime is 1220201200223. The reversal of 1220201200221 is 1220021020221.

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 1220201200221 - 2⁵ = 1220201200189 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1220201200221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1220201200223) 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, 203366866701 + ... + 203366866706.

It is an arithmetic number, because the mean of its divisors is an integer number (406733733408).

Almost surely, 2^{1220201200221} is an apocalyptic number.

It is an amenable number.

1220201200221 is a deficient number, since it is larger than the sum of its proper divisors (406733733411).

1220201200221 is an equidigital number, since it uses as much as digits as its factorization.

1220201200221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 406733733410.

The product of its (nonzero) digits is 64, while the sum is 15.

Adding to 1220201200221 its reverse (1220021020221), we get a palindrome (2440222220442).

The spelling of 1220201200221 in words is "one trillion, two hundred twenty billion, two hundred one million, two hundred thousand, two hundred twenty-one".