1220001220201 has 4 divisors (see below), whose sum is σ = 1259356098304. Its totient is φ = 1180646342100.

The previous prime is 1220001220189. The next prime is 1220001220253. The reversal of 1220001220201 is 1020221000221.

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 1220001220201 - 2¹¹ = 1220001218153 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1220001226201) 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, 19677439005 + ... + 19677439066.

It is an arithmetic number, because the mean of its divisors is an integer number (314839024576).

Almost surely, 2^{1220001220201} is an apocalyptic number.

It is an amenable number.

1220001220201 is a deficient number, since it is larger than the sum of its proper divisors (39354878103).

1220001220201 is an equidigital number, since it uses as much as digits as its factorization.

1220001220201 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39354878102.

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

Adding to 1220001220201 its reverse (1020221000221), we get a palindrome (2240222220422).

The spelling of 1220001220201 in words is "one trillion, two hundred twenty billion, one million, two hundred twenty thousand, two hundred one".