131221122127 has 2 divisors, whose sum is σ = 131221122128. Its totient is φ = 131221122126.

The previous prime is 131221122107. The next prime is 131221122133. The reversal of 131221122127 is 721221122131.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 131221122127 - 2³¹ = 129073638479 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (131221122107) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 65610561063 + 65610561064.

It is an arithmetic number, because the mean of its divisors is an integer number (65610561064).

Almost surely, 2^131221122127 is an apocalyptic number.

131221122127 is a deficient number, since it is larger than the sum of its proper divisors (1).

131221122127 is an equidigital number, since it uses as much as digits as its factorization.

131221122127 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 672, while the sum is 25.

Adding to 131221122127 its reverse (721221122131), we get a palindrome (852442244258).

The spelling of 131221122127 in words is "one hundred thirty-one billion, two hundred twenty-one million, one hundred twenty-two thousand, one hundred twenty-seven".