622017121621 has 16 divisors (see below), whose sum is σ = 729650073600. Its totient is φ = 519191521200.

The previous prime is 622017121591. The next prime is 622017121711. The reversal of 622017121621 is 126121710226.

It is a cyclic number.

It is not a de Polignac number, because 622017121621 - 2¹⁵ = 622017088853 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (622014121621) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4684855 + ... + 4815796.

It is an arithmetic number, because the mean of its divisors is an integer number (45603129600).

Almost surely, 2^622017121621 is an apocalyptic number.

It is an amenable number.

622017121621 is a deficient number, since it is larger than the sum of its proper divisors (107632951979).

622017121621 is a wasteful number, since it uses less digits than its factorization.

622017121621 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9500904.

The product of its (nonzero) digits is 4032, while the sum is 31.

Adding to 622017121621 its reverse (126121710226), we get a palindrome (748138831847).

The spelling of 622017121621 in words is "six hundred twenty-two billion, seventeen million, one hundred twenty-one thousand, six hundred twenty-one".