22130434621 has 2 divisors, whose sum is σ = 22130434622. Its totient is φ = 22130434620.

The previous prime is 22130434609. The next prime is 22130434631. The reversal of 22130434621 is 12643403122.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 19535652900 + 2594781721 = 139770^2 + 50939^2 .

It is a cyclic number.

It is not a de Polignac number, because 22130434621 - 2¹¹ = 22130432573 is a prime.

It is a super-2 number, since 2×22130434621² (a number of 21 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 22130434621.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (22130434631) 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 as a sum of consecutive naturals, namely, 11065217310 + 11065217311.

It is an arithmetic number, because the mean of its divisors is an integer number (11065217311).

Almost surely, 2^22130434621 is an apocalyptic number.

It is an amenable number.

22130434621 is a deficient number, since it is larger than the sum of its proper divisors (1).

22130434621 is an equidigital number, since it uses as much as digits as its factorization.

22130434621 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 6912, while the sum is 28.

Adding to 22130434621 its reverse (12643403122), we get a palindrome (34773837743).

The spelling of 22130434621 in words is "twenty-two billion, one hundred thirty million, four hundred thirty-four thousand, six hundred twenty-one".