10221199979 has 2 divisors, whose sum is σ = 10221199980. Its totient is φ = 10221199978.

The previous prime is 10221199957. The next prime is 10221200009. The reversal of 10221199979 is 97999112201.

It is a weak prime.

It is an emirp because it is prime and its reverse (97999112201) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-10221199979 is a prime.

It is not a weakly prime, because it can be changed into another prime (10221199909) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5110599989 + 5110599990.

It is an arithmetic number, because the mean of its divisors is an integer number (5110599990).

Almost surely, 2^10221199979 is an apocalyptic number.

10221199979 is a deficient number, since it is larger than the sum of its proper divisors (1).

10221199979 is an equidigital number, since it uses as much as digits as its factorization.

10221199979 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 183708, while the sum is 50.

The spelling of 10221199979 in words is "ten billion, two hundred twenty-one million, one hundred ninety-nine thousand, nine hundred seventy-nine".