131223021107 has 2 divisors, whose sum is σ = 131223021108. Its totient is φ = 131223021106.

The previous prime is 131223021103. The next prime is 131223021119. The reversal of 131223021107 is 701120322131.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 131223021107 - 2² = 131223021103 is a prime.

It is not a weakly prime, because it can be changed into another prime (131223021103) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 65611510553 + 65611510554.

It is an arithmetic number, because the mean of its divisors is an integer number (65611510554).

Almost surely, 2^131223021107 is an apocalyptic number.

131223021107 is a deficient number, since it is larger than the sum of its proper divisors (1).

131223021107 is an equidigital number, since it uses as much as digits as its factorization.

131223021107 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 504, while the sum is 23.

Adding to 131223021107 its reverse (701120322131), we get a palindrome (832343343238).

The spelling of 131223021107 in words is "one hundred thirty-one billion, two hundred twenty-three million, twenty-one thousand, one hundred seven".