21112132111121 has 8 divisors (see below), whose sum is σ = 21117280694400. Its totient is φ = 21106983834000.

The previous prime is 21112132111099. The next prime is 21112132111129. The reversal of 21112132111121 is 12111123121112.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21112132111121 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 21112132111093 and 21112132111102.

It is not an unprimeable number, because it can be changed into a prime (21112132111129) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 197868575 + ... + 197975243.

It is an arithmetic number, because the mean of its divisors is an integer number (2639660086800).

Almost surely, 2^{21112132111121} is an apocalyptic number.

It is an amenable number.

21112132111121 is a deficient number, since it is larger than the sum of its proper divisors (5148583279).

21112132111121 is a wasteful number, since it uses less digits than its factorization.

21112132111121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 153079.

The product of its digits is 48, while the sum is 20.

Adding to 21112132111121 its reverse (12111123121112), we get a palindrome (33223255232233).

The spelling of 21112132111121 in words is "twenty-one trillion, one hundred twelve billion, one hundred thirty-two million, one hundred eleven thousand, one hundred twenty-one".