21115344403122 has 16 divisors (see below), whose sum is σ = 42288302305920. Its totient is φ = 7028845884432.

The previous prime is 21115344403117. The next prime is 21115344403207. The reversal of 21115344403122 is 22130444351112.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2400557722 + ... + 2400566517.

It is an arithmetic number, because the mean of its divisors is an integer number (2643018894120).

Almost surely, 2^{21115344403122} is an apocalyptic number.

21115344403122 is an abundant number, since it is smaller than the sum of its proper divisors (21172957902798).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21115344403122 is a wasteful number, since it uses less digits than its factorization.

21115344403122 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4801124977.

The product of its (nonzero) digits is 23040, while the sum is 33.

Adding to 21115344403122 its reverse (22130444351112), we get a palindrome (43245788754234).

The spelling of 21115344403122 in words is "twenty-one trillion, one hundred fifteen billion, three hundred forty-four million, four hundred three thousand, one hundred twenty-two".