20110021219979 has 2 divisors, whose sum is σ = 20110021219980. Its totient is φ = 20110021219978.

The previous prime is 20110021219963. The next prime is 20110021219991. The reversal of 20110021219979 is 97991212001102.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 20110021219979 - 2⁴ = 20110021219963 is a prime.

It is not a weakly prime, because it can be changed into another prime (20110021219879) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10055010609989 + 10055010609990.

It is an arithmetic number, because the mean of its divisors is an integer number (10055010609990).

Almost surely, 2^{20110021219979} is an apocalyptic number.

20110021219979 is a deficient number, since it is larger than the sum of its proper divisors (1).

20110021219979 is an equidigital number, since it uses as much as digits as its factorization.

20110021219979 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 40824, while the sum is 44.

The spelling of 20110021219979 in words is "twenty trillion, one hundred ten billion, twenty-one million, two hundred nineteen thousand, nine hundred seventy-nine".