1235342221 has 2 divisors, whose sum is σ = 1235342222. Its totient is φ = 1235342220.

The previous prime is 1235342201. The next prime is 1235342267. The reversal of 1235342221 is 1222435321.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1234749321 + 592900 = 35139^2 + 770^2 .

It is an emirp because it is prime and its reverse (1222435321) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1235342221 - 2¹³ = 1235334029 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1235342201) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 617671110 + 617671111.

It is an arithmetic number, because the mean of its divisors is an integer number (617671111).

Almost surely, 2^1235342221 is an apocalyptic number.

It is an amenable number.

1235342221 is a deficient number, since it is larger than the sum of its proper divisors (1).

1235342221 is an equidigital number, since it uses as much as digits as its factorization.

1235342221 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2880, while the sum is 25.

The square root of 1235342221 is about 35147.4354825498. The cubic root of 1235342221 is about 1072.9902152764.

Adding to 1235342221 its reverse (1222435321), we get a palindrome (2457777542).

The spelling of 1235342221 in words is "one billion, two hundred thirty-five million, three hundred forty-two thousand, two hundred twenty-one".