641221613233 has 2 divisors, whose sum is σ = 641221613234. Its totient is φ = 641221613232.

The previous prime is 641221613141. The next prime is 641221613237. The reversal of 641221613233 is 332316122146.

It is a happy number.

641221613233 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 397439463184 + 243782150049 = 630428^2 + 493743^2 .

It is a cyclic number.

It is not a de Polignac number, because 641221613233 - 2²¹ = 641219516081 is a prime.

It is a super-2 number, since 2×641221613233² (a number of 24 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (641221613237) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 320610806616 + 320610806617.

It is an arithmetic number, because the mean of its divisors is an integer number (320610806617).

Almost surely, 2^641221613233 is an apocalyptic number.

It is an amenable number.

641221613233 is a deficient number, since it is larger than the sum of its proper divisors (1).

641221613233 is an equidigital number, since it uses as much as digits as its factorization.

641221613233 is an evil number, because the sum of its binary digits is even.

The product of its digits is 31104, while the sum is 34.

Adding to 641221613233 its reverse (332316122146), we get a palindrome (973537735379).

The spelling of 641221613233 in words is "six hundred forty-one billion, two hundred twenty-one million, six hundred thirteen thousand, two hundred thirty-three".