1212122220979 has 2 divisors, whose sum is σ = 1212122220980. Its totient is φ = 1212122220978.

The previous prime is 1212122220961. The next prime is 1212122221019. The reversal of 1212122220979 is 9790222212121.

It is an a-pointer prime, because the next prime (1212122221019) can be obtained adding 1212122220979 to its sum of digits (40).

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1212122220979 - 2¹³ = 1212122212787 is a prime.

It is not a weakly prime, because it can be changed into another prime (1212122220079) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 606061110489 + 606061110490.

It is an arithmetic number, because the mean of its divisors is an integer number (606061110490).

Almost surely, 2^{1212122220979} is an apocalyptic number.

1212122220979 is a deficient number, since it is larger than the sum of its proper divisors (1).

1212122220979 is an equidigital number, since it uses as much as digits as its factorization.

1212122220979 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 36288, while the sum is 40.

The spelling of 1212122220979 in words is "one trillion, two hundred twelve billion, one hundred twenty-two million, two hundred twenty thousand, nine hundred seventy-nine".