21342044201 has 2 divisors, whose sum is σ = 21342044202. Its totient is φ = 21342044200.

The previous prime is 21342044173. The next prime is 21342044231. The reversal of 21342044201 is 10244024312.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 13915741225 + 7426302976 = 117965^2 + 86176^2 .

It is a cyclic number.

It is not a de Polignac number, because 21342044201 - 2¹⁸ = 21341782057 is a prime.

It is not a weakly prime, because it can be changed into another prime (21342044231) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10671022100 + 10671022101.

It is an arithmetic number, because the mean of its divisors is an integer number (10671022101).

Almost surely, 2^21342044201 is an apocalyptic number.

It is an amenable number.

21342044201 is a deficient number, since it is larger than the sum of its proper divisors (1).

21342044201 is an equidigital number, since it uses as much as digits as its factorization.

21342044201 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1536, while the sum is 23.

Adding to 21342044201 its reverse (10244024312), we get a palindrome (31586068513).

The spelling of 21342044201 in words is "twenty-one billion, three hundred forty-two million, forty-four thousand, two hundred one".