1213222141 has 2 divisors, whose sum is σ = 1213222142. Its totient is φ = 1213222140.

The previous prime is 1213222123. The next prime is 1213222177. The reversal of 1213222141 is 1412223121.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1207562500 + 5659641 = 34750^2 + 2379^2 .

It is a cyclic number.

It is not a de Polignac number, because 1213222141 - 2⁷ = 1213222013 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1213222111) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 606611070 + 606611071.

It is an arithmetic number, because the mean of its divisors is an integer number (606611071).

Almost surely, 2^1213222141 is an apocalyptic number.

It is an amenable number.

1213222141 is a deficient number, since it is larger than the sum of its proper divisors (1).

1213222141 is an equidigital number, since it uses as much as digits as its factorization.

1213222141 is an evil number, because the sum of its binary digits is even.

The product of its digits is 192, while the sum is 19.

The square root of 1213222141 is about 34831.3384899289. The cubic root of 1213222141 is about 1066.5472718685.

Adding to 1213222141 its reverse (1412223121), we get a palindrome (2625445262).

The spelling of 1213222141 in words is "one billion, two hundred thirteen million, two hundred twenty-two thousand, one hundred forty-one".