221001310231027 has 2 divisors, whose sum is σ = 221001310231028. Its totient is φ = 221001310231026.

The previous prime is 221001310230733. The next prime is 221001310231033. The reversal of 221001310231027 is 720132013100122.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-221001310231027 is a prime.

It is a super-2 number, since 2×221001310231027² (a number of 29 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 221001310230992 and 221001310231010.

It is not a weakly prime, because it can be changed into another prime (221001310231127) 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, 110500655115513 + 110500655115514.

It is an arithmetic number, because the mean of its divisors is an integer number (110500655115514).

Almost surely, 2^{221001310231027} is an apocalyptic number.

221001310231027 is a deficient number, since it is larger than the sum of its proper divisors (1).

221001310231027 is an equidigital number, since it uses as much as digits as its factorization.

221001310231027 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1008, while the sum is 25.

Adding to 221001310231027 its reverse (720132013100122), we get a palindrome (941133323331149).

The spelling of 221001310231027 in words is "two hundred twenty-one trillion, one billion, three hundred ten million, two hundred thirty-one thousand, twenty-seven".