20211120020111 has 4 divisors (see below), whose sum is σ = 20419482082272. Its totient is φ = 20002757957952.

The previous prime is 20211120020101. The next prime is 20211120020131. The reversal of 20211120020111 is 11102002111202.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20211120020111 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20211120020101) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 104181030935 + ... + 104181031128.

It is an arithmetic number, because the mean of its divisors is an integer number (5104870520568).

Almost surely, 2^{20211120020111} is an apocalyptic number.

20211120020111 is a deficient number, since it is larger than the sum of its proper divisors (208362062161).

20211120020111 is an equidigital number, since it uses as much as digits as its factorization.

20211120020111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 208362062160.

The product of its (nonzero) digits is 16, while the sum is 14.

Adding to 20211120020111 its reverse (11102002111202), we get a palindrome (31313122131313).

The spelling of 20211120020111 in words is "twenty trillion, two hundred eleven billion, one hundred twenty million, twenty thousand, one hundred eleven".