1222230175421 has 2 divisors, whose sum is σ = 1222230175422. Its totient is φ = 1222230175420.

The previous prime is 1222230175417. The next prime is 1222230175531. The reversal of 1222230175421 is 1245710322221.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 993281323225 + 228948852196 = 996635^2 + 478486^2 .

It is an emirp because it is prime and its reverse (1245710322221) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1222230175421 - 2² = 1222230175417 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1222230172421) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 611115087710 + 611115087711.

It is an arithmetic number, because the mean of its divisors is an integer number (611115087711).

Almost surely, 2^{1222230175421} is an apocalyptic number.

It is an amenable number.

1222230175421 is a deficient number, since it is larger than the sum of its proper divisors (1).

1222230175421 is an equidigital number, since it uses as much as digits as its factorization.

1222230175421 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 13440, while the sum is 32.

Adding to 1222230175421 its reverse (1245710322221), we get a palindrome (2467940497642).

The spelling of 1222230175421 in words is "one trillion, two hundred twenty-two billion, two hundred thirty million, one hundred seventy-five thousand, four hundred twenty-one".