20011222122011 has 8 divisors (see below), whose sum is σ = 20061882965760. Its totient is φ = 19960562559168.

The previous prime is 20011222122007. The next prime is 20011222122019. The reversal of 20011222122011 is 11022122211002.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 20011222122011 - 2² = 20011222122007 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20011222122019) 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 7 ways as a sum of consecutive naturals, for example, 36236855 + ... + 36784943.

It is an arithmetic number, because the mean of its divisors is an integer number (2507735370720).

Almost surely, 2^{20011222122011} is an apocalyptic number.

20011222122011 is a deficient number, since it is larger than the sum of its proper divisors (50660843749).

20011222122011 is an equidigital number, since it uses as much as digits as its factorization.

20011222122011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 640453.

The product of its (nonzero) digits is 64, while the sum is 17.

Adding to 20011222122011 its reverse (11022122211002), we get a palindrome (31033344333013).

It can be divided in two parts, 200 and 11222122011, that added together give a palindrome (11222122211).

The spelling of 20011222122011 in words is "twenty trillion, eleven billion, two hundred twenty-two million, one hundred twenty-two thousand, eleven".