2021312104111 has 4 divisors (see below), whose sum is σ = 2064318744672. Its totient is φ = 1978305463552.

The previous prime is 2021312104109. The next prime is 2021312104121. The reversal of 2021312104111 is 1114012131202.

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 2021312104111 - 2¹ = 2021312104109 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 (2021312104121) 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, 21503320210 + ... + 21503320303.

It is an arithmetic number, because the mean of its divisors is an integer number (516079686168).

Almost surely, 2^{2021312104111} is an apocalyptic number.

2021312104111 is a deficient number, since it is larger than the sum of its proper divisors (43006640561).

2021312104111 is an equidigital number, since it uses as much as digits as its factorization.

2021312104111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43006640560.

The product of its (nonzero) digits is 96, while the sum is 19.

Adding to 2021312104111 its reverse (1114012131202), we get a palindrome (3135324235313).

It can be divided in two parts, 20213 and 12104111, that added together give a square (12124324 = 3482²).

The spelling of 2021312104111 in words is "two trillion, twenty-one billion, three hundred twelve million, one hundred four thousand, one hundred eleven".