221020000120243 has 2 divisors, whose sum is σ = 221020000120244. Its totient is φ = 221020000120242.

The previous prime is 221020000120133. The next prime is 221020000120261. The reversal of 221020000120243 is 342021000020122.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 221020000120243 - 2²¹ = 221019998023091 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 221020000120243.

It is not a weakly prime, because it can be changed into another prime (221020000130243) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 110510000060121 + 110510000060122.

It is an arithmetic number, because the mean of its divisors is an integer number (110510000060122).

Almost surely, 2^{221020000120243} is an apocalyptic number.

221020000120243 is a deficient number, since it is larger than the sum of its proper divisors (1).

221020000120243 is an equidigital number, since it uses as much as digits as its factorization.

221020000120243 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 384, while the sum is 19.

Adding to 221020000120243 its reverse (342021000020122), we get a palindrome (563041000140365).

The spelling of 221020000120243 in words is "two hundred twenty-one trillion, twenty billion, one hundred twenty thousand, two hundred forty-three".