31200100131 has 4 divisors (see below), whose sum is σ = 41600133512. Its totient is φ = 20800066752.

The previous prime is 31200100121. The next prime is 31200100189. The reversal of 31200100131 is 13100100213.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 31200100131 - 2¹³ = 31200091939 is a prime.

It is a super-2 number, since 2×31200100131² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (31200100121) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5200016686 + ... + 5200016691.

It is an arithmetic number, because the mean of its divisors is an integer number (10400033378).

Almost surely, 2^31200100131 is an apocalyptic number.

31200100131 is a deficient number, since it is larger than the sum of its proper divisors (10400033381).

31200100131 is a wasteful number, since it uses less digits than its factorization.

31200100131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10400033380.

The product of its (nonzero) digits is 18, while the sum is 12.

Adding to 31200100131 its reverse (13100100213), we get a palindrome (44300200344).

The spelling of 31200100131 in words is "thirty-one billion, two hundred million, one hundred thousand, one hundred thirty-one".