1210321213357 has 2 divisors, whose sum is σ = 1210321213358. Its totient is φ = 1210321213356.

The previous prime is 1210321213247. The next prime is 1210321213391. The reversal of 1210321213357 is 7533121230121.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 802790912196 + 407530301161 = 895986^2 + 638381^2 .

It is an emirp because it is prime and its reverse (7533121230121) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1210321213357 - 2¹⁵ = 1210321180589 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1210321213757) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 605160606678 + 605160606679.

It is an arithmetic number, because the mean of its divisors is an integer number (605160606679).

Almost surely, 2^{1210321213357} is an apocalyptic number.

It is an amenable number.

1210321213357 is a deficient number, since it is larger than the sum of its proper divisors (1).

1210321213357 is an equidigital number, since it uses as much as digits as its factorization.

1210321213357 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 7560, while the sum is 31.

Adding to 1210321213357 its reverse (7533121230121), we get a palindrome (8743442443478).

The spelling of 1210321213357 in words is "one trillion, two hundred ten billion, three hundred twenty-one million, two hundred thirteen thousand, three hundred fifty-seven".