20012222201 has 4 divisors (see below), whose sum is σ = 20015716212. Its totient is φ = 20008728192.

The previous prime is 20012222189. The next prime is 20012222249. The reversal of 20012222201 is 10222221002.

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 6861637225 + 13150584976 = 82835^2 + 114676^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20012222201 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (20012222281) 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, 1738400 + ... + 1749873.

It is an arithmetic number, because the mean of its divisors is an integer number (5003929053).

Almost surely, 2^20012222201 is an apocalyptic number.

It is an amenable number.

20012222201 is a deficient number, since it is larger than the sum of its proper divisors (3494011).

20012222201 is an equidigital number, since it uses as much as digits as its factorization.

20012222201 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3494010.

The product of its (nonzero) digits is 64, while the sum is 14.

Adding to 20012222201 its reverse (10222221002), we get a palindrome (30234443203).

The spelling of 20012222201 in words is "twenty billion, twelve million, two hundred twenty-two thousand, two hundred one".