743212011221 has 2 divisors, whose sum is σ = 743212011222. Its totient is φ = 743212011220.

The previous prime is 743212011203. The next prime is 743212011263. The reversal of 743212011221 is 122110212347.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 683084067121 + 60127944100 = 826489^2 + 245210^2 .

It is an emirp because it is prime and its reverse (122110212347) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-743212011221 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (743212011821) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 371606005610 + 371606005611.

It is an arithmetic number, because the mean of its divisors is an integer number (371606005611).

Almost surely, 2^743212011221 is an apocalyptic number.

It is an amenable number.

743212011221 is a deficient number, since it is larger than the sum of its proper divisors (1).

743212011221 is an equidigital number, since it uses as much as digits as its factorization.

743212011221 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1344, while the sum is 26.

Adding to 743212011221 its reverse (122110212347), we get a palindrome (865322223568).

The spelling of 743212011221 in words is "seven hundred forty-three billion, two hundred twelve million, eleven thousand, two hundred twenty-one".