20120122201 has 4 divisors (see below), whose sum is σ = 20128011904. Its totient is φ = 20112232500.

The previous prime is 20120122199. The next prime is 20120122207. The reversal of 20120122201 is 10222102102.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 20120122201 - 2¹ = 20120122199 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20120122207) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3941025 + ... + 3946126.

It is an arithmetic number, because the mean of its divisors is an integer number (5032002976).

Almost surely, 2^20120122201 is an apocalyptic number.

It is an amenable number.

20120122201 is a deficient number, since it is larger than the sum of its proper divisors (7889703).

20120122201 is an equidigital number, since it uses as much as digits as its factorization.

20120122201 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7889702.

The product of its (nonzero) digits is 32, while the sum is 13.

Adding to 20120122201 its reverse (10222102102), we get a palindrome (30342224303).

The spelling of 20120122201 in words is "twenty billion, one hundred twenty million, one hundred twenty-two thousand, two hundred one".