20001011001211 has 4 divisors (see below), whose sum is σ = 20001293209624. Its totient is φ = 20000728792800.

The previous prime is 20001011001173. The next prime is 20001011001217. The reversal of 20001011001211 is 11210011010002.

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 20001011001211 - 2³⁵ = 19966651262843 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20001011001217) 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, 140997870 + ... + 141139651.

It is an arithmetic number, because the mean of its divisors is an integer number (5000323302406).

Almost surely, 2^{20001011001211} is an apocalyptic number.

20001011001211 is a deficient number, since it is larger than the sum of its proper divisors (282208413).

20001011001211 is an equidigital number, since it uses as much as digits as its factorization.

20001011001211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 282208412.

The product of its (nonzero) digits is 4, while the sum is 10.

Adding to 20001011001211 its reverse (11210011010002), we get a palindrome (31211022011213).

The spelling of 20001011001211 in words is "twenty trillion, one billion, eleven million, one thousand, two hundred eleven".