21030222041 has 2 divisors, whose sum is σ = 21030222042. Its totient is φ = 21030222040.

The previous prime is 21030221951. The next prime is 21030222047. The reversal of 21030222041 is 14022203012.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 20386128400 + 644093641 = 142780^2 + 25379^2 .

It is a cyclic number.

It is not a de Polignac number, because 21030222041 - 2¹⁸ = 21029959897 is a prime.

It is not a weakly prime, because it can be changed into another prime (21030222047) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10515111020 + 10515111021.

It is an arithmetic number, because the mean of its divisors is an integer number (10515111021).

Almost surely, 2^21030222041 is an apocalyptic number.

It is an amenable number.

21030222041 is a deficient number, since it is larger than the sum of its proper divisors (1).

21030222041 is an equidigital number, since it uses as much as digits as its factorization.

21030222041 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 192, while the sum is 17.

Adding to 21030222041 its reverse (14022203012), we get a palindrome (35052425053).

The spelling of 21030222041 in words is "twenty-one billion, thirty million, two hundred twenty-two thousand, forty-one".