23122213302421 has 2 divisors, whose sum is σ = 23122213302422. Its totient is φ = 23122213302420.

The previous prime is 23122213302329. The next prime is 23122213302427. The reversal of 23122213302421 is 12420331222132.

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., 23087352304900 + 34860997521 = 4804930^2 + 186711^2 .

It is a cyclic number.

It is not a de Polignac number, because 23122213302421 - 2¹⁵ = 23122213269653 is a prime.

It is a super-2 number, since 2×23122213302421² (a number of 28 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 23122213302421.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (23122213302427) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11561106651210 + 11561106651211.

It is an arithmetic number, because the mean of its divisors is an integer number (11561106651211).

Almost surely, 2^{23122213302421} is an apocalyptic number.

It is an amenable number.

23122213302421 is a deficient number, since it is larger than the sum of its proper divisors (1).

23122213302421 is an equidigital number, since it uses as much as digits as its factorization.

23122213302421 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 23122213302421 its reverse (12420331222132), we get a palindrome (35542544524553).

The spelling of 23122213302421 in words is "twenty-three trillion, one hundred twenty-two billion, two hundred thirteen million, three hundred two thousand, four hundred twenty-one".