22022226361621 has 2 divisors, whose sum is σ = 22022226361622. Its totient is φ = 22022226361620.

The previous prime is 22022226361607. The next prime is 22022226361679. The reversal of 22022226361621 is 12616362222022.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 12988534889521 + 9033691472100 = 3603961^2 + 3005610^2 .

It is a cyclic number.

It is not a de Polignac number, because 22022226361621 - 2⁷ = 22022226361493 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (22022226331621) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11011113180810 + 11011113180811.

It is an arithmetic number, because the mean of its divisors is an integer number (11011113180811).

Almost surely, 2^{22022226361621} is an apocalyptic number.

It is an amenable number.

22022226361621 is a deficient number, since it is larger than the sum of its proper divisors (1).

22022226361621 is an equidigital number, since it uses as much as digits as its factorization.

22022226361621 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 82944, while the sum is 37.

Adding to 22022226361621 its reverse (12616362222022), we get a palindrome (34638588583643).

The spelling of 22022226361621 in words is "twenty-two trillion, twenty-two billion, two hundred twenty-six million, three hundred sixty-one thousand, six hundred twenty-one".