10221219979 has 2 divisors, whose sum is σ = 10221219980. Its totient is φ = 10221219978.

The previous prime is 10221219959. The next prime is 10221219997. The reversal of 10221219979 is 97991212201.

Together with next prime (10221219997) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 10221219979 - 2¹¹ = 10221217931 is a prime.

It is not a weakly prime, because it can be changed into another prime (10221219929) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5110609989 + 5110609990.

It is an arithmetic number, because the mean of its divisors is an integer number (5110609990).

Almost surely, 2^10221219979 is an apocalyptic number.

10221219979 is a deficient number, since it is larger than the sum of its proper divisors (1).

10221219979 is an equidigital number, since it uses as much as digits as its factorization.

10221219979 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 40824, while the sum is 43.

The spelling of 10221219979 in words is "ten billion, two hundred twenty-one million, two hundred nineteen thousand, nine hundred seventy-nine".