1220222210201 has 4 divisors (see below), whose sum is σ = 1220467584612. Its totient is φ = 1219976835792.

The previous prime is 1220222210159. The next prime is 1220222210219. The reversal of 1220222210201 is 1020122220221.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 683408089225 + 536814120976 = 826685^2 + 732676^2 .

It is a cyclic number.

It is not a de Polignac number, because 1220222210201 - 2²² = 1220218015897 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1220222210201.

It is not an unprimeable number, because it can be changed into a prime (1220222210281) 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, 122679746 + ... + 122689691.

It is an arithmetic number, because the mean of its divisors is an integer number (305116896153).

Almost surely, 2^{1220222210201} is an apocalyptic number.

It is an amenable number.

1220222210201 is a deficient number, since it is larger than the sum of its proper divisors (245374411).

1220222210201 is an equidigital number, since it uses as much as digits as its factorization.

1220222210201 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 245374410.

The product of its (nonzero) digits is 128, while the sum is 17.

Adding to 1220222210201 its reverse (1020122220221), we get a palindrome (2240344430422).

The spelling of 1220222210201 in words is "one trillion, two hundred twenty billion, two hundred twenty-two million, two hundred ten thousand, two hundred one".