20213102102111 has 4 divisors (see below), whose sum is σ = 20865137653824. Its totient is φ = 19561066550400.

The previous prime is 20213102102107. The next prime is 20213102102129. The reversal of 20213102102111 is 11120120131202.

It is a happy number.

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 20213102102111 - 2² = 20213102102107 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 20213102102111.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20213102102411) 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, 326017775810 + ... + 326017775871.

It is an arithmetic number, because the mean of its divisors is an integer number (5216284413456).

Almost surely, 2^{20213102102111} is an apocalyptic number.

20213102102111 is a deficient number, since it is larger than the sum of its proper divisors (652035551713).

20213102102111 is an equidigital number, since it uses as much as digits as its factorization.

20213102102111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 652035551712.

The product of its (nonzero) digits is 48, while the sum is 17.

Adding to 20213102102111 its reverse (11120120131202), we get a palindrome (31333222233313).

The spelling of 20213102102111 in words is "twenty trillion, two hundred thirteen billion, one hundred two million, one hundred two thousand, one hundred eleven".