1222343245421 has 2 divisors, whose sum is σ = 1222343245422. Its totient is φ = 1222343245420.

The previous prime is 1222343245381. The next prime is 1222343245469. The reversal of 1222343245421 is 1245423432221.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1218363402025 + 3979843396 = 1103795^2 + 63086^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1222343245421 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1222363245421) 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, 611171622710 + 611171622711.

It is an arithmetic number, because the mean of its divisors is an integer number (611171622711).

Almost surely, 2^{1222343245421} is an apocalyptic number.

It is an amenable number.

1222343245421 is a deficient number, since it is larger than the sum of its proper divisors (1).

1222343245421 is an equidigital number, since it uses as much as digits as its factorization.

1222343245421 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 92160, while the sum is 35.

Adding to 1222343245421 its reverse (1245423432221), we get a palindrome (2467766677642).

The spelling of 1222343245421 in words is "one trillion, two hundred twenty-two billion, three hundred forty-three million, two hundred forty-five thousand, four hundred twenty-one".