201312131211 has 24 divisors (see below), whose sum is σ = 304085317536. Its totient is φ = 128094426240.

The previous prime is 201312131201. The next prime is 201312131249. The reversal of 201312131211 is 112131213102.

201312131211 is a `hidden beast` number, since 201 + 312 + 131 + 21 + 1 = 666.

It is not a de Polignac number, because 201312131211 - 2⁶ = 201312131147 is a prime.

It is not an unprimeable number, because it can be changed into a prime (201312131201) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 959370 + ... + 1150223.

It is an arithmetic number, because the mean of its divisors is an integer number (12670221564).

Almost surely, 2^201312131211 is an apocalyptic number.

201312131211 is a deficient number, since it is larger than the sum of its proper divisors (102773186325).

201312131211 is a wasteful number, since it uses less digits than its factorization.

201312131211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2110083 (or 2110080 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 18.

Adding to 201312131211 its reverse (112131213102), we get a palindrome (313443344313).

The spelling of 201312131211 in words is "two hundred one billion, three hundred twelve million, one hundred thirty-one thousand, two hundred eleven".