221339136833 has 2 divisors, whose sum is σ = 221339136834. Its totient is φ = 221339136832.

The previous prime is 221339136829. The next prime is 221339136881. The reversal of 221339136833 is 338631933122.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 193522567744 + 27816569089 = 439912^2 + 166783^2 .

It is a cyclic number.

It is not a de Polignac number, because 221339136833 - 2² = 221339136829 is a prime.

It is not a weakly prime, because it can be changed into another prime (221339136803) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 110669568416 + 110669568417.

It is an arithmetic number, because the mean of its divisors is an integer number (110669568417).

Almost surely, 2^221339136833 is an apocalyptic number.

It is an amenable number.

221339136833 is a deficient number, since it is larger than the sum of its proper divisors (1).

221339136833 is an equidigital number, since it uses as much as digits as its factorization.

221339136833 is an evil number, because the sum of its binary digits is even.

The product of its digits is 419904, while the sum is 44.

The spelling of 221339136833 in words is "two hundred twenty-one billion, three hundred thirty-nine million, one hundred thirty-six thousand, eight hundred thirty-three".