22222112002421 has 2 divisors, whose sum is σ = 22222112002422. Its totient is φ = 22222112002420.

The previous prime is 22222112002397. The next prime is 22222112002451. The reversal of 22222112002421 is 12420021122222.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 18169886638225 + 4052225364196 = 4262615^2 + 2013014^2 .

It is a cyclic number.

It is not a de Polignac number, because 22222112002421 - 2¹⁴ = 22222111986037 is a prime.

It is a super-2 number, since 2×22222112002421² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (22222112002451) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11111056001210 + 11111056001211.

It is an arithmetic number, because the mean of its divisors is an integer number (11111056001211).

Almost surely, 2^{22222112002421} is an apocalyptic number.

It is an amenable number.

22222112002421 is a deficient number, since it is larger than the sum of its proper divisors (1).

22222112002421 is an equidigital number, since it uses as much as digits as its factorization.

22222112002421 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1024, while the sum is 23.

Adding to 22222112002421 its reverse (12420021122222), we get a palindrome (34642133124643).

The spelling of 22222112002421 in words is "twenty-two trillion, two hundred twenty-two billion, one hundred twelve million, two thousand, four hundred twenty-one".