20001031211 has 8 divisors (see below), whose sum is σ = 23245751040. Its totient is φ = 16853168808.

The previous prime is 20001031201. The next prime is 20001031213. The reversal of 20001031211 is 11213010002.

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

It is not a de Polignac number, because 20001031211 - 2⁶ = 20001031147 is a prime.

It is a super-2 number, since 2×20001031211² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20001031192 and 20001031201.

It is not an unprimeable number, because it can be changed into a prime (20001031213) 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, 24213911 + ... + 24214736.

It is an arithmetic number, because the mean of its divisors is an integer number (2905718880).

Almost surely, 2^20001031211 is an apocalyptic number.

20001031211 is a deficient number, since it is larger than the sum of its proper divisors (3244719829).

20001031211 is an equidigital number, since it uses as much as digits as its factorization.

20001031211 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 48428713.

The product of its (nonzero) digits is 12, while the sum is 11.

Adding to 20001031211 its reverse (11213010002), we get a palindrome (31214041213).

The spelling of 20001031211 in words is "twenty billion, one million, thirty-one thousand, two hundred eleven".