20131201311 has 24 divisors (see below), whose sum is σ = 29462193936. Its totient is φ = 12154621440.

The previous prime is 20131201301. The next prime is 20131201327. The reversal of 20131201311 is 11310213102.

It is a happy number.

It is not a de Polignac number, because 20131201311 - 2¹³ = 20131193119 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20131201301) 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, 17671 + ... + 201431.

It is an arithmetic number, because the mean of its divisors is an integer number (1227591414).

Almost surely, 2^20131201311 is an apocalyptic number.

20131201311 is a deficient number, since it is larger than the sum of its proper divisors (9330992625).

20131201311 is a wasteful number, since it uses less digits than its factorization.

20131201311 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 183883 (or 183830 counting only the distinct ones).

The product of its (nonzero) digits is 36, while the sum is 15.

Adding to 20131201311 its reverse (11310213102), we get a palindrome (31441414413).

The spelling of 20131201311 in words is "twenty billion, one hundred thirty-one million, two hundred one thousand, three hundred eleven".