31133320191131 has 2 divisors, whose sum is σ = 31133320191132. Its totient is φ = 31133320191130.

The previous prime is 31133320191107. The next prime is 31133320191163. The reversal of 31133320191131 is 13119102333113.

It is an a-pointer prime, because the next prime (31133320191163) can be obtained adding 31133320191131 to its sum of digits (32).

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-31133320191131 is a prime.

It is a super-2 number, since 2×31133320191131² (a number of 28 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (31133320101131) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15566660095565 + 15566660095566.

It is an arithmetic number, because the mean of its divisors is an integer number (15566660095566).

Almost surely, 2^{31133320191131} is an apocalyptic number.

31133320191131 is a deficient number, since it is larger than the sum of its proper divisors (1).

31133320191131 is an equidigital number, since it uses as much as digits as its factorization.

31133320191131 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4374, while the sum is 32.

The spelling of 31133320191131 in words is "thirty-one trillion, one hundred thirty-three billion, three hundred twenty million, one hundred ninety-one thousand, one hundred thirty-one".