221020142303 has 2 divisors, whose sum is σ = 221020142304. Its totient is φ = 221020142302.

The previous prime is 221020142261. The next prime is 221020142333. The reversal of 221020142303 is 303241020122.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 221020142303 - 2⁸ = 221020142047 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (221020142333) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 110510071151 + 110510071152.

It is an arithmetic number, because the mean of its divisors is an integer number (110510071152).

Almost surely, 2^221020142303 is an apocalyptic number.

221020142303 is a deficient number, since it is larger than the sum of its proper divisors (1).

221020142303 is an equidigital number, since it uses as much as digits as its factorization.

221020142303 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 576, while the sum is 20.

Adding to 221020142303 its reverse (303241020122), we get a palindrome (524261162425).

The spelling of 221020142303 in words is "two hundred twenty-one billion, twenty million, one hundred forty-two thousand, three hundred three".