221131111111073 has 2 divisors, whose sum is σ = 221131111111074. Its totient is φ = 221131111111072.

The previous prime is 221131111111051. The next prime is 221131111111139. The reversal of 221131111111073 is 370111111131122.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 221056591392784 + 74519718289 = 14867972^2 + 272983^2 .

It is a cyclic number.

It is not a de Polignac number, because 221131111111073 - 2¹⁸ = 221131110848929 is a prime.

It is a super-2 number, since 2×221131111111073² (a number of 29 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (221131111114073) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 110565555555536 + 110565555555537.

It is an arithmetic number, because the mean of its divisors is an integer number (110565555555537).

Almost surely, 2^{221131111111073} is an apocalyptic number.

It is an amenable number.

221131111111073 is a deficient number, since it is larger than the sum of its proper divisors (1).

221131111111073 is an equidigital number, since it uses as much as digits as its factorization.

221131111111073 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 252, while the sum is 26.

Adding to 221131111111073 its reverse (370111111131122), we get a palindrome (591242222242195).

The spelling of 221131111111073 in words is "two hundred twenty-one trillion, one hundred thirty-one billion, one hundred eleven million, one hundred eleven thousand, seventy-three".