20001021211011 has 8 divisors (see below), whose sum is σ = 26668106357760. Its totient is φ = 13333975102472.

The previous prime is 20001021211001. The next prime is 20001021211013. The reversal of 20001021211011 is 11011212010002.

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 20001021211011 - 2⁵ = 20001021210979 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20001021211013) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8542395 + ... + 10628948.

It is an arithmetic number, because the mean of its divisors is an integer number (3333513294720).

Almost surely, 2^{20001021211011} is an apocalyptic number.

20001021211011 is a deficient number, since it is larger than the sum of its proper divisors (6667085146749).

20001021211011 is a wasteful number, since it uses less digits than its factorization.

20001021211011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19519105.

The product of its (nonzero) digits is 8, while the sum is 12.

Adding to 20001021211011 its reverse (11011212010002), we get a palindrome (31012233221013).

The spelling of 20001021211011 in words is "twenty trillion, one billion, twenty-one million, two hundred eleven thousand, eleven".