20112221001 has 64 divisors (see below), whose sum is σ = 28382112000. Its totient is φ = 12659328000.

The previous prime is 20112220939. The next prime is 20112221011. The reversal of 20112221001 is 10012221102.

It is not a de Polignac number, because 20112221001 - 2⁷ = 20112220873 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20112221011) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 134981275 + ... + 134981423.

It is an arithmetic number, because the mean of its divisors is an integer number (443470500).

Almost surely, 2^20112221001 is an apocalyptic number.

It is an amenable number.

20112221001 is a deficient number, since it is larger than the sum of its proper divisors (8269890999).

20112221001 is a wasteful number, since it uses less digits than its factorization.

20112221001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 490.

The product of its (nonzero) digits is 16, while the sum is 12.

Adding to 20112221001 its reverse (10012221102), we get a palindrome (30124442103).

The spelling of 20112221001 in words is "twenty billion, one hundred twelve million, two hundred twenty-one thousand, one".