1210120309969 has 2 divisors, whose sum is σ = 1210120309970. Its totient is φ = 1210120309968.

The previous prime is 1210120309901. The next prime is 1210120310039. The reversal of 1210120309969 is 9699030210121.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 826439173569 + 383681136400 = 909087^2 + 619420^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1210120309969 is a prime.

It is a super-2 number, since 2×1210120309969² (a number of 25 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (1210120301969) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 605060154984 + 605060154985.

It is an arithmetic number, because the mean of its divisors is an integer number (605060154985).

Almost surely, 2^{1210120309969} is an apocalyptic number.

It is an amenable number.

1210120309969 is a deficient number, since it is larger than the sum of its proper divisors (1).

1210120309969 is an equidigital number, since it uses as much as digits as its factorization.

1210120309969 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 52488, while the sum is 43.

The spelling of 1210120309969 in words is "one trillion, two hundred ten billion, one hundred twenty million, three hundred nine thousand, nine hundred sixty-nine".