1213311201253 has 2 divisors, whose sum is σ = 1213311201254. Its totient is φ = 1213311201252.

The previous prime is 1213311201239. The next prime is 1213311201259. The reversal of 1213311201253 is 3521021133121.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 975418942689 + 237892258564 = 987633^2 + 487742^2 .

It is an emirp because it is prime and its reverse (3521021133121) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1213311201253 - 2⁹ = 1213311200741 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1213311201259) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 606655600626 + 606655600627.

It is an arithmetic number, because the mean of its divisors is an integer number (606655600627).

Almost surely, 2^{1213311201253} is an apocalyptic number.

It is an amenable number.

1213311201253 is a deficient number, since it is larger than the sum of its proper divisors (1).

1213311201253 is an equidigital number, since it uses as much as digits as its factorization.

1213311201253 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1080, while the sum is 25.

Adding to 1213311201253 its reverse (3521021133121), we get a palindrome (4734332334374).

The spelling of 1213311201253 in words is "one trillion, two hundred thirteen billion, three hundred eleven million, two hundred one thousand, two hundred fifty-three".