1213121023369 has 2 divisors, whose sum is σ = 1213121023370. Its totient is φ = 1213121023368.

The previous prime is 1213121023313. The next prime is 1213121023399. The reversal of 1213121023369 is 9633201213121.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1010049120144 + 203071903225 = 1005012^2 + 450635^2 .

It is an emirp because it is prime and its reverse (9633201213121) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1213121023369 - 2¹⁷ = 1213120892297 is a prime.

It is a super-2 number, since 2×1213121023369² (a number of 25 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (1213121023399) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 606560511684 + 606560511685.

It is an arithmetic number, because the mean of its divisors is an integer number (606560511685).

Almost surely, 2^{1213121023369} is an apocalyptic number.

It is an amenable number.

1213121023369 is a deficient number, since it is larger than the sum of its proper divisors (1).

1213121023369 is an equidigital number, since it uses as much as digits as its factorization.

1213121023369 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 11664, while the sum is 34.

The spelling of 1213121023369 in words is "one trillion, two hundred thirteen billion, one hundred twenty-one million, twenty-three thousand, three hundred sixty-nine".