1222112621 has 2 divisors, whose sum is σ = 1222112622. Its totient is φ = 1222112620.

The previous prime is 1222112587. The next prime is 1222112651. The reversal of 1222112621 is 1262112221.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 912704521 + 309408100 = 30211^2 + 17590^2 .

It is a cyclic number.

It is not a de Polignac number, because 1222112621 - 2⁶ = 1222112557 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1222112593 and 1222112602.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1222112651) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 611056310 + 611056311.

It is an arithmetic number, because the mean of its divisors is an integer number (611056311).

Almost surely, 2^1222112621 is an apocalyptic number.

It is an amenable number.

1222112621 is a deficient number, since it is larger than the sum of its proper divisors (1).

1222112621 is an equidigital number, since it uses as much as digits as its factorization.

1222112621 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 192, while the sum is 20.

The square root of 1222112621 is about 34958.7273938855. The cubic root of 1222112621 is about 1069.1461499812.

Adding to 1222112621 its reverse (1262112221), we get a palindrome (2484224842).

It can be divided in two parts, 12221 and 12621, that added together give a palindrome (24842).

The spelling of 1222112621 in words is "one billion, two hundred twenty-two million, one hundred twelve thousand, six hundred twenty-one".