20001131211 has 8 divisors (see below), whose sum is σ = 27528438784. Its totient is φ = 12903955560.

The previous prime is 20001131197. The next prime is 20001131219. The reversal of 20001131211 is 11213110002.

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

It is not a de Polignac number, because 20001131211 - 2¹¹ = 20001129163 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20001131219) 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, 107532871 + ... + 107533056.

It is an arithmetic number, because the mean of its divisors is an integer number (3441054848).

Almost surely, 2^20001131211 is an apocalyptic number.

20001131211 is a deficient number, since it is larger than the sum of its proper divisors (7527307573).

20001131211 is a wasteful number, since it uses less digits than its factorization.

20001131211 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 215065961.

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

Adding to 20001131211 its reverse (11213110002), we get a palindrome (31214241213).

The spelling of 20001131211 in words is "twenty billion, one million, one hundred thirty-one thousand, two hundred eleven".