9212115649879 has 2 divisors, whose sum is σ = 9212115649880. Its totient is φ = 9212115649878.

The previous prime is 9212115649817. The next prime is 9212115649883. The reversal of 9212115649879 is 9789465112129.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 9212115649879 - 2¹⁷ = 9212115518807 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 9212115649879.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (9212115640879) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4606057824939 + 4606057824940.

It is an arithmetic number, because the mean of its divisors is an integer number (4606057824940).

Almost surely, 2^{9212115649879} is an apocalyptic number.

9212115649879 is a deficient number, since it is larger than the sum of its proper divisors (1).

9212115649879 is an equidigital number, since it uses as much as digits as its factorization.

9212115649879 is an evil number, because the sum of its binary digits is even.

The product of its digits is 19595520, while the sum is 64.

The spelling of 9212115649879 in words is "nine trillion, two hundred twelve billion, one hundred fifteen million, six hundred forty-nine thousand, eight hundred seventy-nine".