20001001222011 has 4 divisors (see below), whose sum is σ = 26668001629352. Its totient is φ = 13334000814672.

The previous prime is 20001001221997. The next prime is 20001001222021. The reversal of 20001001222011 is 11022210010002.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 20001001222011 - 2⁹ = 20001001221499 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20001001222021) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3333500203666 + ... + 3333500203671.

It is an arithmetic number, because the mean of its divisors is an integer number (6667000407338).

Almost surely, 2^{20001001222011} is an apocalyptic number.

20001001222011 is a deficient number, since it is larger than the sum of its proper divisors (6667000407341).

20001001222011 is an equidigital number, since it uses as much as digits as its factorization.

20001001222011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6667000407340.

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

Adding to 20001001222011 its reverse (11022210010002), we get a palindrome (31023211232013).

The spelling of 20001001222011 in words is "twenty trillion, one billion, one million, two hundred twenty-two thousand, eleven".