20001122111879 has 2 divisors, whose sum is σ = 20001122111880. Its totient is φ = 20001122111878.

The previous prime is 20001122111869. The next prime is 20001122111963. The reversal of 20001122111879 is 97811122110002.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 20001122111879 - 2³⁶ = 19932402635143 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20001122111869) 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, 10000561055939 + 10000561055940.

It is an arithmetic number, because the mean of its divisors is an integer number (10000561055940).

Almost surely, 2^{20001122111879} is an apocalyptic number.

20001122111879 is a deficient number, since it is larger than the sum of its proper divisors (1).

20001122111879 is an equidigital number, since it uses as much as digits as its factorization.

20001122111879 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4032, while the sum is 35.

The spelling of 20001122111879 in words is "twenty trillion, one billion, one hundred twenty-two million, one hundred eleven thousand, eight hundred seventy-nine".