127120121021701 has 2 divisors, whose sum is σ = 127120121021702. Its totient is φ = 127120121021700.

The previous prime is 127120121021681. The next prime is 127120121021717. The reversal of 127120121021701 is 107120121021721.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 120184409008225 + 6935712013476 = 10962865^2 + 2633574^2 .

It is a cyclic number.

It is not a de Polignac number, because 127120121021701 - 2²⁹ = 127119584150789 is a prime.

It is a super-2 number, since 2×127120121021701² (a number of 29 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 127120121021701.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (127120121021791) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 63560060510850 + 63560060510851.

It is an arithmetic number, because the mean of its divisors is an integer number (63560060510851).

Almost surely, 2^{127120121021701} is an apocalyptic number.

It is an amenable number.

127120121021701 is a deficient number, since it is larger than the sum of its proper divisors (1).

127120121021701 is an equidigital number, since it uses as much as digits as its factorization.

127120121021701 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 784, while the sum is 28.

The spelling of 127120121021701 in words is "one hundred twenty-seven trillion, one hundred twenty billion, one hundred twenty-one million, twenty-one thousand, seven hundred one".