22122423343421 has 4 divisors (see below), whose sum is σ = 22485086021244. Its totient is φ = 21759760665600.

The previous prime is 22122423343379. The next prime is 22122423343463. The reversal of 22122423343421 is 12434332422122.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (22122423343379) and next prime (22122423343463).

It can be written as a sum of positive squares in 2 ways, for example, as 402964692025 + 21719458651396 = 634795^2 + 4660414^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-22122423343421 is a prime.

It is a super-2 number, since 2×22122423343421² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22122423340421) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 181331338820 + ... + 181331338941.

It is an arithmetic number, because the mean of its divisors is an integer number (5621271505311).

Almost surely, 2^{22122423343421} is an apocalyptic number.

It is an amenable number.

22122423343421 is a deficient number, since it is larger than the sum of its proper divisors (362662677823).

22122423343421 is an equidigital number, since it uses as much as digits as its factorization.

22122423343421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 362662677822.

The product of its digits is 110592, while the sum is 35.

Adding to 22122423343421 its reverse (12434332422122), we get a palindrome (34556755765543).

The spelling of 22122423343421 in words is "twenty-two trillion, one hundred twenty-two billion, four hundred twenty-three million, three hundred forty-three thousand, four hundred twenty-one".