20213112103211 has 4 divisors (see below), whose sum is σ = 20213124645912. Its totient is φ = 20213099560512.

The previous prime is 20213112103201. The next prime is 20213112103213. The reversal of 20213112103211 is 11230121131202.

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 20213112103211 - 2¹⁰ = 20213112102187 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20213112103213) 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 3 ways as a sum of consecutive naturals, for example, 3422726 + ... + 7220891.

It is an arithmetic number, because the mean of its divisors is an integer number (5053281161478).

Almost surely, 2^{20213112103211} is an apocalyptic number.

20213112103211 is a deficient number, since it is larger than the sum of its proper divisors (12542701).

20213112103211 is a wasteful number, since it uses less digits than its factorization.

20213112103211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12542700.

The product of its (nonzero) digits is 144, while the sum is 20.

Adding to 20213112103211 its reverse (11230121131202), we get a palindrome (31443233234413).

The spelling of 20213112103211 in words is "twenty trillion, two hundred thirteen billion, one hundred twelve million, one hundred three thousand, two hundred eleven".