1213222223137 has 2 divisors, whose sum is σ = 1213222223138. Its totient is φ = 1213222223136.

The previous prime is 1213222223027. The next prime is 1213222223221. The reversal of 1213222223137 is 7313222223121.

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., 1149271905681 + 63950317456 = 1072041^2 + 252884^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1213222223137 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1213222223099 and 1213222223108.

It is not a weakly prime, because it can be changed into another prime (1213222523137) 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, 606611111568 + 606611111569.

It is an arithmetic number, because the mean of its divisors is an integer number (606611111569).

Almost surely, 2^{1213222223137} is an apocalyptic number.

It is an amenable number.

1213222223137 is a deficient number, since it is larger than the sum of its proper divisors (1).

1213222223137 is an equidigital number, since it uses as much as digits as its factorization.

1213222223137 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 12096, while the sum is 31.

Adding to 1213222223137 its reverse (7313222223121), we get a palindrome (8526444446258).

The spelling of 1213222223137 in words is "one trillion, two hundred thirteen billion, two hundred twenty-two million, two hundred twenty-three thousand, one hundred thirty-seven".