31301222112131 has 4 divisors (see below), whose sum is σ = 31304541093264. Its totient is φ = 31297903131000.

The previous prime is 31301222112109. The next prime is 31301222112133. The reversal of 31301222112131 is 13121122210313.

It is a happy number.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-31301222112131 is a prime.

It is a super-2 number, since 2×31301222112131² (a number of 28 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 31301222112097 and 31301222112106.

It is not an unprimeable number, because it can be changed into a prime (31301222112133) 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, 1659476420 + ... + 1659495281.

It is an arithmetic number, because the mean of its divisors is an integer number (7826135273316).

Almost surely, 2^{31301222112131} is an apocalyptic number.

31301222112131 is a deficient number, since it is larger than the sum of its proper divisors (3318981133).

31301222112131 is an equidigital number, since it uses as much as digits as its factorization.

31301222112131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3318981132.

The product of its (nonzero) digits is 432, while the sum is 23.

Adding to 31301222112131 its reverse (13121122210313), we get a palindrome (44422344322444).

The spelling of 31301222112131 in words is "thirty-one trillion, three hundred one billion, two hundred twenty-two million, one hundred twelve thousand, one hundred thirty-one".