131123220311 has 2 divisors, whose sum is σ = 131123220312. Its totient is φ = 131123220310.

The previous prime is 131123220307. The next prime is 131123220341. The reversal of 131123220311 is 113022321131.

It is a happy number.

It is a weak prime.

It is an emirp because it is prime and its reverse (113022321131) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 131123220311 - 2² = 131123220307 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (131123220341) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 65561610155 + 65561610156.

It is an arithmetic number, because the mean of its divisors is an integer number (65561610156).

Almost surely, 2^131123220311 is an apocalyptic number.

131123220311 is a deficient number, since it is larger than the sum of its proper divisors (1).

131123220311 is an equidigital number, since it uses as much as digits as its factorization.

131123220311 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 216, while the sum is 20.

Adding to 131123220311 its reverse (113022321131), we get a palindrome (244145541442).

The spelling of 131123220311 in words is "one hundred thirty-one billion, one hundred twenty-three million, two hundred twenty thousand, three hundred eleven".