20231001221177 has 2 divisors, whose sum is σ = 20231001221178. Its totient is φ = 20231001221176.

The previous prime is 20231001221149. The next prime is 20231001221201. The reversal of 20231001221177 is 77112210013202.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 10795850775616 + 9435150445561 = 3285704^2 + 3071669^2 .

It is a cyclic number.

It is not a de Polignac number, because 20231001221177 - 2²⁴ = 20230984443961 is a prime.

It is a super-2 number, since 2×20231001221177² (a number of 27 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (20231001229177) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10115500610588 + 10115500610589.

It is an arithmetic number, because the mean of its divisors is an integer number (10115500610589).

Almost surely, 2^{20231001221177} is an apocalyptic number.

It is an amenable number.

20231001221177 is a deficient number, since it is larger than the sum of its proper divisors (1).

20231001221177 is an equidigital number, since it uses as much as digits as its factorization.

20231001221177 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2352, while the sum is 29.

Adding to 20231001221177 its reverse (77112210013202), we get a palindrome (97343211234379).

The spelling of 20231001221177 in words is "twenty trillion, two hundred thirty-one billion, one million, two hundred twenty-one thousand, one hundred seventy-seven".