7900212109969 has 2 divisors, whose sum is σ = 7900212109970. Its totient is φ = 7900212109968.

The previous prime is 7900212109957. The next prime is 7900212110003. The reversal of 7900212109969 is 9699012120097.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 5660211974400 + 2240000135569 = 2379120^2 + 1496663^2 .

It is an emirp because it is prime and its reverse (9699012120097) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 7900212109969 - 2⁹ = 7900212109457 is a prime.

It is a super-2 number, since 2×7900212109969² (a number of 27 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (7900212109169) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3950106054984 + 3950106054985.

It is an arithmetic number, because the mean of its divisors is an integer number (3950106054985).

Almost surely, 2^{7900212109969} is an apocalyptic number.

It is an amenable number.

7900212109969 is a deficient number, since it is larger than the sum of its proper divisors (1).

7900212109969 is an equidigital number, since it uses as much as digits as its factorization.

7900212109969 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1102248, while the sum is 55.

The spelling of 7900212109969 in words is "seven trillion, nine hundred billion, two hundred twelve million, one hundred nine thousand, nine hundred sixty-nine".