20131210131 has 8 divisors (see below), whose sum is σ = 26867958720. Its totient is φ = 13407634152.

The previous prime is 20131210129. The next prime is 20131210133. The reversal of 20131210131 is 13101213102.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (20131210129) and next prime (20131210133).

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

It is not a de Polignac number, because 20131210131 - 2¹ = 20131210129 is a prime.

It is a super-2 number, since 2×20131210131² (a number of 21 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 20131210131.

It is not an unprimeable number, because it can be changed into a prime (20131210133) 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, 3289585 + ... + 3295698.

It is an arithmetic number, because the mean of its divisors is an integer number (3358494840).

Almost surely, 2^20131210131 is an apocalyptic number.

20131210131 is a deficient number, since it is larger than the sum of its proper divisors (6736748589).

20131210131 is a wasteful number, since it uses less digits than its factorization.

20131210131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6586305.

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

Adding to 20131210131 its reverse (13101213102), we get a palindrome (33232423233).

The spelling of 20131210131 in words is "twenty billion, one hundred thirty-one million, two hundred ten thousand, one hundred thirty-one".