1212315121357 has 2 divisors, whose sum is σ = 1212315121358. Its totient is φ = 1212315121356.

The previous prime is 1212315121333. The next prime is 1212315121447. The reversal of 1212315121357 is 7531215132121.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 662553672676 + 549761448681 = 813974^2 + 741459^2 .

It is a cyclic number.

It is not a de Polignac number, because 1212315121357 - 2³¹ = 1210167637709 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1212315121327) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 606157560678 + 606157560679.

It is an arithmetic number, because the mean of its divisors is an integer number (606157560679).

Almost surely, 2^{1212315121357} is an apocalyptic number.

It is an amenable number.

1212315121357 is a deficient number, since it is larger than the sum of its proper divisors (1).

1212315121357 is an equidigital number, since it uses as much as digits as its factorization.

1212315121357 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 12600, while the sum is 34.

The spelling of 1212315121357 in words is "one trillion, two hundred twelve billion, three hundred fifteen million, one hundred twenty-one thousand, three hundred fifty-seven".