20201122001 has 4 divisors (see below), whose sum is σ = 20201672100. Its totient is φ = 20200571904.

The previous prime is 20201121991. The next prime is 20201122021. The reversal of 20201122001 is 10022110202.

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 12304133776 + 7896988225 = 110924^2 + 88865^2 .

It is a cyclic number.

It is not a de Polignac number, because 20201122001 - 2¹⁰ = 20201120977 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20201122021) 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, 215696 + ... + 294833.

It is an arithmetic number, because the mean of its divisors is an integer number (5050418025).

Almost surely, 2^20201122001 is an apocalyptic number.

It is an amenable number.

20201122001 is a deficient number, since it is larger than the sum of its proper divisors (550099).

20201122001 is an equidigital number, since it uses as much as digits as its factorization.

20201122001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 550098.

The product of its (nonzero) digits is 16, while the sum is 11.

Adding to 20201122001 its reverse (10022110202), we get a palindrome (30223232203).

The spelling of 20201122001 in words is "twenty billion, two hundred one million, one hundred twenty-two thousand, one".