21112120121311 has 8 divisors (see below), whose sum is σ = 21582360806400. Its totient is φ = 20645626374360.

The previous prime is 21112120121297. The next prime is 21112120121333. The reversal of 21112120121311 is 11312102121112.

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 21112120121311 - 2²⁷ = 21111985903583 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 (21112120121341) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 936723141 + ... + 936745678.

It is an arithmetic number, because the mean of its divisors is an integer number (2697795100800).

Almost surely, 2^{21112120121311} is an apocalyptic number.

21112120121311 is a deficient number, since it is larger than the sum of its proper divisors (470240685089).

21112120121311 is a wasteful number, since it uses less digits than its factorization.

21112120121311 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1873469069.

The product of its (nonzero) digits is 48, while the sum is 19.

Adding to 21112120121311 its reverse (11312102121112), we get a palindrome (32424222242423).

The spelling of 21112120121311 in words is "twenty-one trillion, one hundred twelve billion, one hundred twenty million, one hundred twenty-one thousand, three hundred eleven".