20102000021111 has 4 divisors (see below), whose sum is σ = 20104569631392. Its totient is φ = 20099430410832.

The previous prime is 20102000021107. The next prime is 20102000021141. The reversal of 20102000021111 is 11112000020102.

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

It is a cyclic number.

It is not a de Polignac number, because 20102000021111 - 2² = 20102000021107 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20102000021092 and 20102000021101.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20102000021101) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1284793406 + ... + 1284809051.

It is an arithmetic number, because the mean of its divisors is an integer number (5026142407848).

Almost surely, 2^{20102000021111} is an apocalyptic number.

20102000021111 is a deficient number, since it is larger than the sum of its proper divisors (2569610281).

20102000021111 is an equidigital number, since it uses as much as digits as its factorization.

20102000021111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2569610280.

The product of its (nonzero) digits is 8, while the sum is 11.

Adding to 20102000021111 its reverse (11112000020102), we get a palindrome (31214000041213).

The spelling of 20102000021111 in words is "twenty trillion, one hundred two billion, twenty-one thousand, one hundred eleven".