20112220001 has 2 divisors, whose sum is σ = 20112220002. Its totient is φ = 20112220000.

The previous prime is 20112219989. The next prime is 20112220069. The reversal of 20112220001 is 10002221102.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 10399920400 + 9712299601 = 101980^2 + 98551^2 .

It is a cyclic number.

It is not a de Polignac number, because 20112220001 - 2¹⁸ = 20111957857 is a prime.

It is not a weakly prime, because it can be changed into another prime (20112220301) 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 as a sum of consecutive naturals, namely, 10056110000 + 10056110001.

It is an arithmetic number, because the mean of its divisors is an integer number (10056110001).

Almost surely, 2^20112220001 is an apocalyptic number.

It is an amenable number.

20112220001 is a deficient number, since it is larger than the sum of its proper divisors (1).

20112220001 is an equidigital number, since it uses as much as digits as its factorization.

20112220001 is an odious number, because the sum of its binary digits is odd.

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

Adding to 20112220001 its reverse (10002221102), we get a palindrome (30114441103).

The spelling of 20112220001 in words is "twenty billion, one hundred twelve million, two hundred twenty thousand, one".