20001001211 has 8 divisors (see below), whose sum is σ = 21245631264. Its totient is φ = 18763937920.

The previous prime is 20001001201. The next prime is 20001001291. The reversal of 20001001211 is 11210010002.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20001001211 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20001001201) 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, 1886240 + ... + 1896813.

It is an arithmetic number, because the mean of its divisors is an integer number (2655703908).

Almost surely, 2^20001001211 is an apocalyptic number.

20001001211 is a deficient number, since it is larger than the sum of its proper divisors (1244630053).

20001001211 is a wasteful number, since it uses less digits than its factorization.

20001001211 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3783381.

The product of its (nonzero) digits is 4, while the sum is 8.

Adding to 20001001211 its reverse (11210010002), we get a palindrome (31211011213).

The spelling of 20001001211 in words is "twenty billion, one million, one thousand, two hundred eleven".