21111122013331 has 8 divisors (see below), whose sum is σ = 24209341287264. Its totient is φ = 18033488914560.

The previous prime is 21111122013329. The next prime is 21111122013337. The reversal of 21111122013331 is 13331022111112.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 21111122013331 - 2¹ = 21111122013329 is a prime.

It is a super-2 number, since 2×21111122013331² (a number of 27 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (21111122013337) 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, 5146541590 + ... + 5146545691.

It is an arithmetic number, because the mean of its divisors is an integer number (3026167660908).

Almost surely, 2^{21111122013331} is an apocalyptic number.

21111122013331 is a deficient number, since it is larger than the sum of its proper divisors (3098219273933).

21111122013331 is a wasteful number, since it uses less digits than its factorization.

21111122013331 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10293087581.

The product of its (nonzero) digits is 216, while the sum is 22.

Adding to 21111122013331 its reverse (13331022111112), we get a palindrome (34442144124443).

The spelling of 21111122013331 in words is "twenty-one trillion, one hundred eleven billion, one hundred twenty-two million, thirteen thousand, three hundred thirty-one".