10122021979 has 2 divisors, whose sum is σ = 10122021980. Its totient is φ = 10122021978.

The previous prime is 10122021971. The next prime is 10122022013. The reversal of 10122021979 is 97912022101.

It is a happy number.

It is an a-pointer prime, because the next prime (10122022013) can be obtained adding 10122021979 to its sum of digits (34).

It is a weak prime.

It is an emirp because it is prime and its reverse (97912022101) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 10122021979 - 2³ = 10122021971 is a prime.

It is not a weakly prime, because it can be changed into another prime (10122021971) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5061010989 + 5061010990.

It is an arithmetic number, because the mean of its divisors is an integer number (5061010990).

Almost surely, 2^10122021979 is an apocalyptic number.

10122021979 is a deficient number, since it is larger than the sum of its proper divisors (1).

10122021979 is an equidigital number, since it uses as much as digits as its factorization.

10122021979 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4536, while the sum is 34.

The spelling of 10122021979 in words is "ten billion, one hundred twenty-two million, twenty-one thousand, nine hundred seventy-nine".