31301132121213 has 4 divisors (see below), whose sum is σ = 41734842828288. Its totient is φ = 20867421414140.

The previous prime is 31301132121187. The next prime is 31301132121223. The reversal of 31301132121213 is 31212123110313.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 31301132121213 - 2¹⁰ = 31301132120189 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31301132121223) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5216855353533 + ... + 5216855353538.

It is an arithmetic number, because the mean of its divisors is an integer number (10433710707072).

Almost surely, 2^{31301132121213} is an apocalyptic number.

It is an amenable number.

31301132121213 is a deficient number, since it is larger than the sum of its proper divisors (10433710707075).

31301132121213 is a wasteful number, since it uses less digits than its factorization.

31301132121213 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10433710707074.

The product of its (nonzero) digits is 648, while the sum is 24.

Adding to 31301132121213 its reverse (31212123110313), we get a palindrome (62513255231526).

The spelling of 31301132121213 in words is "thirty-one trillion, three hundred one billion, one hundred thirty-two million, one hundred twenty-one thousand, two hundred thirteen".