131222121329951 has 2 divisors, whose sum is σ = 131222121329952. Its totient is φ = 131222121329950.

The previous prime is 131222121329947. The next prime is 131222121330029. The reversal of 131222121329951 is 159923121222131.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 131222121329951 - 2² = 131222121329947 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (131222121329911) 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 as a sum of consecutive naturals, namely, 65611060664975 + 65611060664976.

It is an arithmetic number, because the mean of its divisors is an integer number (65611060664976).

Almost surely, 2^{131222121329951} is an apocalyptic number.

131222121329951 is a deficient number, since it is larger than the sum of its proper divisors (1).

131222121329951 is an equidigital number, since it uses as much as digits as its factorization.

131222121329951 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 116640, while the sum is 44.

The spelling of 131222121329951 in words is "one hundred thirty-one trillion, two hundred twenty-two billion, one hundred twenty-one million, three hundred twenty-nine thousand, nine hundred fifty-one".