21344101121 has 16 divisors (see below), whose sum is σ = 25187340288. Its totient is φ = 17699720400.

The previous prime is 21344101087. The next prime is 21344101201. The reversal of 21344101121 is 12110144312.

It is a cyclic number.

It is not a de Polignac number, because 21344101121 - 2⁶ = 21344101057 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 21344101093 and 21344101102.

It is not an unprimeable number, because it can be changed into a prime (21344100121) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 875726 + ... + 899768.

It is an arithmetic number, because the mean of its divisors is an integer number (1574208768).

Almost surely, 2^21344101121 is an apocalyptic number.

It is an amenable number.

21344101121 is a deficient number, since it is larger than the sum of its proper divisors (3843239167).

21344101121 is a wasteful number, since it uses less digits than its factorization.

21344101121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28172.

The product of its (nonzero) digits is 192, while the sum is 20.

Adding to 21344101121 its reverse (12110144312), we get a palindrome (33454245433).

The spelling of 21344101121 in words is "twenty-one billion, three hundred forty-four million, one hundred one thousand, one hundred twenty-one".