20021100102111 has 8 divisors (see below), whose sum is σ = 26694823814064. Its totient is φ = 13347388229120.

The previous prime is 20021100102079. The next prime is 20021100102161. The reversal of 20021100102111 is 11120100112002.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 20021100102111 - 2⁵ = 20021100102079 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20021100102161) 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 in 7 ways as a sum of consecutive naturals, for example, 2343871 + ... + 6748031.

It is an arithmetic number, because the mean of its divisors is an integer number (3336852976758).

Almost surely, 2^{20021100102111} is an apocalyptic number.

20021100102111 is a deficient number, since it is larger than the sum of its proper divisors (6673723711953).

20021100102111 is a wasteful number, since it uses less digits than its factorization.

20021100102111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5919481.

The product of its (nonzero) digits is 8, while the sum is 12.

Adding to 20021100102111 its reverse (11120100112002), we get a palindrome (31141200214113).

The spelling of 20021100102111 in words is "twenty trillion, twenty-one billion, one hundred million, one hundred two thousand, one hundred eleven".