622771121621 has 16 divisors (see below), whose sum is σ = 680830617600. Its totient is φ = 564953297520.

The previous prime is 622771121603. The next prime is 622771121653. The reversal of 622771121621 is 126121177226.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 622771121621 - 2³⁴ = 605591252437 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (622771111621) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 12869930 + ... + 12918228.

It is an arithmetic number, because the mean of its divisors is an integer number (42551913600).

Almost surely, 2^622771121621 is an apocalyptic number.

It is an amenable number.

622771121621 is a deficient number, since it is larger than the sum of its proper divisors (58059495979).

622771121621 is a wasteful number, since it uses less digits than its factorization.

622771121621 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 50776.

The product of its digits is 28224, while the sum is 38.

Adding to 622771121621 its reverse (126121177226), we get a palindrome (748892298847).

The spelling of 622771121621 in words is "six hundred twenty-two billion, seven hundred seventy-one million, one hundred twenty-one thousand, six hundred twenty-one".