31240111241131 has 4 divisors (see below), whose sum is σ = 33643196721232. Its totient is φ = 28837025761032.

The previous prime is 31240111241111. The next prime is 31240111241137. The reversal of 31240111241131 is 13114211104213.

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 31240111241131 - 2²¹ = 31240109143979 is a prime.

It is a super-2 number, since 2×31240111241131² (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 = 31240111241096 and 31240111241105.

It is not an unprimeable number, because it can be changed into a prime (31240111241137) 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, 1201542740031 + ... + 1201542740056.

It is an arithmetic number, because the mean of its divisors is an integer number (8410799180308).

Almost surely, 2^{31240111241131} is an apocalyptic number.

31240111241131 is a deficient number, since it is larger than the sum of its proper divisors (2403085480101).

31240111241131 is a wasteful number, since it uses less digits than its factorization.

31240111241131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2403085480100.

The product of its (nonzero) digits is 576, while the sum is 25.

Adding to 31240111241131 its reverse (13114211104213), we get a palindrome (44354322345344).

The spelling of 31240111241131 in words is "thirty-one trillion, two hundred forty billion, one hundred eleven million, two hundred forty-one thousand, one hundred thirty-one".