31201020131 has 8 divisors (see below), whose sum is σ = 31972239600. Its totient is φ = 30430287360.

The previous prime is 31201020079. The next prime is 31201020143. The reversal of 31201020131 is 13102010213.

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

It is a cyclic number.

It is not a de Polignac number, because 31201020131 - 2²² = 31196825827 is a prime.

It is a super-4 number, since 4×31201020131⁴ (a number of 43 digits) contains 4444 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (31201020931) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9860 + ... + 249998.

It is an arithmetic number, because the mean of its divisors is an integer number (3996529950).

Almost surely, 2^31201020131 is an apocalyptic number.

31201020131 is a deficient number, since it is larger than the sum of its proper divisors (771219469).

31201020131 is a wasteful number, since it uses less digits than its factorization.

31201020131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 243349.

The product of its (nonzero) digits is 36, while the sum is 14.

Adding to 31201020131 its reverse (13102010213), we get a palindrome (44303030344).

The spelling of 31201020131 in words is "thirty-one billion, two hundred one million, twenty thousand, one hundred thirty-one".