221034115811 has 2 divisors, whose sum is σ = 221034115812. Its totient is φ = 221034115810.

The previous prime is 221034115763. The next prime is 221034115817. The reversal of 221034115811 is 118511430122.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 221034115811 - 2¹⁰ = 221034114787 is a prime.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (221034115817) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 110517057905 + 110517057906.

It is an arithmetic number, because the mean of its divisors is an integer number (110517057906).

Almost surely, 2^221034115811 is an apocalyptic number.

221034115811 is a deficient number, since it is larger than the sum of its proper divisors (1).

221034115811 is an equidigital number, since it uses as much as digits as its factorization.

221034115811 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1920, while the sum is 29.

Adding to 221034115811 its reverse (118511430122), we get a palindrome (339545545933).

The spelling of 221034115811 in words is "two hundred twenty-one billion, thirty-four million, one hundred fifteen thousand, eight hundred eleven".