21222232601 has 2 divisors, whose sum is σ = 21222232602. Its totient is φ = 21222232600.

The previous prime is 21222232597. The next prime is 21222232613. The reversal of 21222232601 is 10623222212.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 10970467600 + 10251765001 = 104740^2 + 101251^2 .

It is a cyclic number.

It is not a de Polignac number, because 21222232601 - 2² = 21222232597 is a prime.

It is a super-3 number, since 3×21222232601³ (a number of 32 digits) contains 333 as substring.

It is not a weakly prime, because it can be changed into another prime (21222232301) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10611116300 + 10611116301.

It is an arithmetic number, because the mean of its divisors is an integer number (10611116301).

Almost surely, 2^21222232601 is an apocalyptic number.

It is an amenable number.

21222232601 is a deficient number, since it is larger than the sum of its proper divisors (1).

21222232601 is an equidigital number, since it uses as much as digits as its factorization.

21222232601 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 23.

Adding to 21222232601 its reverse (10623222212), we get a palindrome (31845454813).

The spelling of 21222232601 in words is "twenty-one billion, two hundred twenty-two million, two hundred thirty-two thousand, six hundred one".