221120000211811 has 2 divisors, whose sum is σ = 221120000211812. Its totient is φ = 221120000211810.

The previous prime is 221120000211797. The next prime is 221120000211853. The reversal of 221120000211811 is 118112000021122.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 221120000211811 - 2¹⁹ = 221119999687523 is a prime.

It is not a weakly prime, because it can be changed into another prime (221120000211211) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 110560000105905 + 110560000105906.

It is an arithmetic number, because the mean of its divisors is an integer number (110560000105906).

Almost surely, 2^{221120000211811} is an apocalyptic number.

221120000211811 is a deficient number, since it is larger than the sum of its proper divisors (1).

221120000211811 is an equidigital number, since it uses as much as digits as its factorization.

221120000211811 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 128, while the sum is 22.

Adding to 221120000211811 its reverse (118112000021122), we get a palindrome (339232000232933).

The spelling of 221120000211811 in words is "two hundred twenty-one trillion, one hundred twenty billion, two hundred eleven thousand, eight hundred eleven".