20001101021211 has 16 divisors (see below), whose sum is σ = 26715085322400. Its totient is φ = 13310593302528.

The previous prime is 20001101021201. The next prime is 20001101021233. The reversal of 20001101021211 is 11212010110002.

It is not a de Polignac number, because 20001101021211 - 2⁹ = 20001101020699 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20001101021201) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 72718795 + ... + 72993323.

It is an arithmetic number, because the mean of its divisors is an integer number (1669692832650).

Almost surely, 2^{20001101021211} is an apocalyptic number.

20001101021211 is a deficient number, since it is larger than the sum of its proper divisors (6713984301189).

20001101021211 is a wasteful number, since it uses less digits than its factorization.

20001101021211 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 317198.

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

Adding to 20001101021211 its reverse (11212010110002), we get a palindrome (31213111131213).

The spelling of 20001101021211 in words is "twenty trillion, one billion, one hundred one million, twenty-one thousand, two hundred eleven".