1001220122201 has 4 divisors (see below), whose sum is σ = 1078237054692. Its totient is φ = 924203189712.

The previous prime is 1001220122197. The next prime is 1001220122261. The reversal of 1001220122201 is 1022210221001.

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 655329106576 + 345891015625 = 809524^2 + 588125^2 .

It is a cyclic number.

It is not a de Polignac number, because 1001220122201 - 2² = 1001220122197 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1001220122261) 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, 38508466226 + ... + 38508466251.

It is an arithmetic number, because the mean of its divisors is an integer number (269559263673).

Almost surely, 2^{1001220122201} is an apocalyptic number.

It is an amenable number.

1001220122201 is a deficient number, since it is larger than the sum of its proper divisors (77016932491).

1001220122201 is an equidigital number, since it uses as much as digits as its factorization.

1001220122201 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 77016932490.

The product of its (nonzero) digits is 32, while the sum is 14.

Adding to 1001220122201 its reverse (1022210221001), we get a palindrome (2023430343202).

The spelling of 1001220122201 in words is "one trillion, one billion, two hundred twenty million, one hundred twenty-two thousand, two hundred one".