31301213320131 has 4 divisors (see below), whose sum is σ = 41734951093512. Its totient is φ = 20867475546752.

The previous prime is 31301213320121. The next prime is 31301213320177. The reversal of 31301213320131 is 13102331210313.

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

It is a cyclic number.

It is not a de Polignac number, because 31301213320131 - 2⁵ = 31301213320099 is a prime.

It is a super-2 number, since 2×31301213320131² (a number of 28 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (31301213320121) 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, 5216868886686 + ... + 5216868886691.

It is an arithmetic number, because the mean of its divisors is an integer number (10433737773378).

Almost surely, 2^{31301213320131} is an apocalyptic number.

31301213320131 is a deficient number, since it is larger than the sum of its proper divisors (10433737773381).

31301213320131 is a wasteful number, since it uses less digits than its factorization.

31301213320131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10433737773380.

The product of its (nonzero) digits is 972, while the sum is 24.

Adding to 31301213320131 its reverse (13102331210313), we get a palindrome (44403544530444).

The spelling of 31301213320131 in words is "thirty-one trillion, three hundred one billion, two hundred thirteen million, three hundred twenty thousand, one hundred thirty-one".