21312122303111 has 8 divisors (see below), whose sum is σ = 21533211308784. Its totient is φ = 21091061387520.

The previous prime is 21312122303083. The next prime is 21312122303119. The reversal of 21312122303111 is 11130322121312.

It is a happy number.

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 21312122303111 - 2¹⁰ = 21312122302087 is a prime.

It is a super-2 number, since 2×21312122303111² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21312122303119) 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 7 ways as a sum of consecutive naturals, for example, 5495525 + ... + 8533758.

It is an arithmetic number, because the mean of its divisors is an integer number (2691651413598).

Almost surely, 2^{21312122303111} is an apocalyptic number.

21312122303111 is a deficient number, since it is larger than the sum of its proper divisors (221089005673).

21312122303111 is a wasteful number, since it uses less digits than its factorization.

21312122303111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14045041.

The product of its (nonzero) digits is 432, while the sum is 23.

Adding to 21312122303111 its reverse (11130322121312), we get a palindrome (32442444424423).

The spelling of 21312122303111 in words is "twenty-one trillion, three hundred twelve billion, one hundred twenty-two million, three hundred three thousand, one hundred eleven".