21410342202121 has 4 divisors (see below), whose sum is σ = 21415901889744. Its totient is φ = 21404782514500.

The previous prime is 21410342202107. The next prime is 21410342202149. The reversal of 21410342202121 is 12120224301412.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 21410342202121 - 2⁷ = 21410342201993 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21410342202421) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2779838035 + ... + 2779845736.

It is an arithmetic number, because the mean of its divisors is an integer number (5353975472436).

Almost surely, 2^{21410342202121} is an apocalyptic number.

It is an amenable number.

21410342202121 is a deficient number, since it is larger than the sum of its proper divisors (5559687623).

21410342202121 is an equidigital number, since it uses as much as digits as its factorization.

21410342202121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5559687622.

The product of its (nonzero) digits is 1536, while the sum is 25.

Adding to 21410342202121 its reverse (12120224301412), we get a palindrome (33530566503533).

The spelling of 21410342202121 in words is "twenty-one trillion, four hundred ten billion, three hundred forty-two million, two hundred two thousand, one hundred twenty-one".