20001220002011 has 4 divisors (see below), whose sum is σ = 20870838262992. Its totient is φ = 19131601741032.

The previous prime is 20001220001989. The next prime is 20001220002031. The reversal of 20001220002011 is 11020002210002.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 20001220002011 - 2⁶ = 20001220001947 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20001220001983 and 20001220002001.

It is not an unprimeable number, because it can be changed into a prime (20001220002031) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 434809130456 + ... + 434809130501.

It is an arithmetic number, because the mean of its divisors is an integer number (5217709565748).

Almost surely, 2^{20001220002011} is an apocalyptic number.

20001220002011 is a deficient number, since it is larger than the sum of its proper divisors (869618260981).

20001220002011 is an equidigital number, since it uses as much as digits as its factorization.

20001220002011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 869618260980.

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

Adding to 20001220002011 its reverse (11020002210002), we get a palindrome (31021222212013).

The spelling of 20001220002011 in words is "twenty trillion, one billion, two hundred twenty million, two thousand, eleven".