21234322201 has 2 divisors, whose sum is σ = 21234322202. Its totient is φ = 21234322200.

The previous prime is 21234322189. The next prime is 21234322273. The reversal of 21234322201 is 10222343212.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 18756672025 + 2477650176 = 136955^2 + 49776^2 .

It is a cyclic number.

It is not a de Polignac number, because 21234322201 - 2¹³ = 21234314009 is a prime.

It is not a weakly prime, because it can be changed into another prime (21234322601) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10617161100 + 10617161101.

It is an arithmetic number, because the mean of its divisors is an integer number (10617161101).

Almost surely, 2^21234322201 is an apocalyptic number.

It is an amenable number.

21234322201 is a deficient number, since it is larger than the sum of its proper divisors (1).

21234322201 is an equidigital number, since it uses as much as digits as its factorization.

21234322201 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1152, while the sum is 22.

Adding to 21234322201 its reverse (10222343212), we get a palindrome (31456665413).

The spelling of 21234322201 in words is "twenty-one billion, two hundred thirty-four million, three hundred twenty-two thousand, two hundred one".