20012211001 has 2 divisors, whose sum is σ = 20012211002. Its totient is φ = 20012211000.

The previous prime is 20012210993. The next prime is 20012211007. The reversal of 20012211001 is 10011221002.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 10904371776 + 9107839225 = 104424^2 + 95435^2 .

It is a cyclic number.

It is not a de Polignac number, because 20012211001 - 2³ = 20012210993 is a prime.

It is not a weakly prime, because it can be changed into another prime (20012211007) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10006105500 + 10006105501.

It is an arithmetic number, because the mean of its divisors is an integer number (10006105501).

Almost surely, 2^20012211001 is an apocalyptic number.

It is an amenable number.

20012211001 is a deficient number, since it is larger than the sum of its proper divisors (1).

20012211001 is an equidigital number, since it uses as much as digits as its factorization.

20012211001 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 8, while the sum is 10.

Adding to 20012211001 its reverse (10011221002), we get a palindrome (30023432003).

The spelling of 20012211001 in words is "twenty billion, twelve million, two hundred eleven thousand, one".