101218979 has 2 divisors, whose sum is σ = 101218980. Its totient is φ = 101218978.

The previous prime is 101218919. The next prime is 101218991. The reversal of 101218979 is 979812101.

It is a strong prime.

It is an emirp because it is prime and its reverse (979812101) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 101218979 - 2²⁰ = 100170403 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (101218919) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 50609489 + 50609490.

It is an arithmetic number, because the mean of its divisors is an integer number (50609490).

Almost surely, 2^101218979 is an apocalyptic number.

101218979 is a deficient number, since it is larger than the sum of its proper divisors (1).

101218979 is an equidigital number, since it uses as much as digits as its factorization.

101218979 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 9072, while the sum is 38.

The square root of 101218979 is about 10060.7643347809. The cubic root of 101218979 is about 466.0372712979.

It can be divided in two parts, 1012 and 18979, that added together give a palindrome (19991).

The spelling of 101218979 in words is "one hundred one million, two hundred eighteen thousand, nine hundred seventy-nine".