20201120001 has 24 divisors (see below), whose sum is σ = 29367074880. Its totient is φ = 13380920736.

The previous prime is 20201119957. The next prime is 20201120011. The reversal of 20201120001 is 10002110202.

It is not a de Polignac number, because 20201120001 - 2¹¹ = 20201117953 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (9).

It is not an unprimeable number, because it can be changed into a prime (20201120011) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2197651 + ... + 2206823.

It is an arithmetic number, because the mean of its divisors is an integer number (1223628120).

Almost surely, 2^20201120001 is an apocalyptic number.

It is an amenable number.

20201120001 is a deficient number, since it is larger than the sum of its proper divisors (9165954879).

20201120001 is a wasteful number, since it uses less digits than its factorization.

20201120001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10725 (or 10722 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 9.

Adding to 20201120001 its reverse (10002110202), we get a palindrome (30203230203).

The spelling of 20201120001 in words is "twenty billion, two hundred one million, one hundred twenty thousand, one".