21232012201 has 2 divisors, whose sum is σ = 21232012202. Its totient is φ = 21232012200.

The previous prime is 21232012187. The next prime is 21232012231. The reversal of 21232012201 is 10221023212.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 14787776025 + 6444236176 = 121605^2 + 80276^2 .

It is a cyclic number.

It is not a de Polignac number, because 21232012201 - 2¹³ = 21232004009 is a prime.

It is not a weakly prime, because it can be changed into another prime (21232012231) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10616006100 + 10616006101.

It is an arithmetic number, because the mean of its divisors is an integer number (10616006101).

Almost surely, 2^21232012201 is an apocalyptic number.

It is an amenable number.

21232012201 is a deficient number, since it is larger than the sum of its proper divisors (1).

21232012201 is an equidigital number, since it uses as much as digits as its factorization.

21232012201 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 96, while the sum is 16.

Adding to 21232012201 its reverse (10221023212), we get a palindrome (31453035413).

The spelling of 21232012201 in words is "twenty-one billion, two hundred thirty-two million, twelve thousand, two hundred one".