1212022221979 has 2 divisors, whose sum is σ = 1212022221980. Its totient is φ = 1212022221978.

The previous prime is 1212022221859. The next prime is 1212022222003. The reversal of 1212022221979 is 9791222202121.

It is a strong prime.

It is an emirp because it is prime and its reverse (9791222202121) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1212022221979 - 2¹⁷ = 1212022090907 is a prime.

It is not a weakly prime, because it can be changed into another prime (1212022221479) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 606011110989 + 606011110990.

It is an arithmetic number, because the mean of its divisors is an integer number (606011110990).

Almost surely, 2^{1212022221979} is an apocalyptic number.

1212022221979 is a deficient number, since it is larger than the sum of its proper divisors (1).

1212022221979 is an equidigital number, since it uses as much as digits as its factorization.

1212022221979 is an evil number, because the sum of its binary digits is even.

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

The spelling of 1212022221979 in words is "one trillion, two hundred twelve billion, twenty-two million, two hundred twenty-one thousand, nine hundred seventy-nine".