127256132233421 has 2 divisors, whose sum is σ = 127256132233422. Its totient is φ = 127256132233420.

The previous prime is 127256132233331. The next prime is 127256132233487. The reversal of 127256132233421 is 124332231652721.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 87709780622500 + 39546351610921 = 9365350^2 + 6288589^2 .

It is an emirp because it is prime and its reverse (124332231652721) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 127256132233421 - 2¹⁴ = 127256132217037 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (127256132283421) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 63628066116710 + 63628066116711.

It is an arithmetic number, because the mean of its divisors is an integer number (63628066116711).

Almost surely, 2^{127256132233421} is an apocalyptic number.

It is an amenable number.

127256132233421 is a deficient number, since it is larger than the sum of its proper divisors (1).

127256132233421 is an equidigital number, since it uses as much as digits as its factorization.

127256132233421 is an evil number, because the sum of its binary digits is even.

The product of its digits is 725760, while the sum is 44.

The spelling of 127256132233421 in words is "one hundred twenty-seven trillion, two hundred fifty-six billion, one hundred thirty-two million, two hundred thirty-three thousand, four hundred twenty-one".