31202120013 has 8 divisors (see below), whose sum is σ = 41750880576. Its totient is φ = 20727386400.

The previous prime is 31202120011. The next prime is 31202120021. The reversal of 31202120013 is 31002120213.

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

It is not a de Polignac number, because 31202120013 - 2¹ = 31202120011 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 31202119974 and 31202120001.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31202120011) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 18505753 + ... + 18507438.

It is an arithmetic number, because the mean of its divisors is an integer number (5218860072).

Almost surely, 2^31202120013 is an apocalyptic number.

It is an amenable number.

31202120013 is a deficient number, since it is larger than the sum of its proper divisors (10548760563).

31202120013 is a wasteful number, since it uses less digits than its factorization.

31202120013 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 37013475.

The product of its (nonzero) digits is 72, while the sum is 15.

Adding to 31202120013 its reverse (31002120213), we get a palindrome (62204240226).

The spelling of 31202120013 in words is "thirty-one billion, two hundred two million, one hundred twenty thousand, thirteen".