21134221410021 has 8 divisors (see below), whose sum is σ = 28188472172640. Its totient is φ = 14084725793712.

The previous prime is 21134221409953. The next prime is 21134221410023. The reversal of 21134221410021 is 12001412243112.

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

It is not a de Polignac number, because 21134221410021 - 2¹⁰ = 21134221408997 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 21134221409973 and 21134221410000.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21134221410023) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1188776206 + ... + 1188793983.

It is an arithmetic number, because the mean of its divisors is an integer number (3523559021580).

Almost surely, 2^{21134221410021} is an apocalyptic number.

It is an amenable number.

21134221410021 is a deficient number, since it is larger than the sum of its proper divisors (7054250762619).

21134221410021 is a wasteful number, since it uses less digits than its factorization.

21134221410021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2377573155.

The product of its (nonzero) digits is 768, while the sum is 24.

Adding to 21134221410021 its reverse (12001412243112), we get a palindrome (33135633653133).

The spelling of 21134221410021 in words is "twenty-one trillion, one hundred thirty-four billion, two hundred twenty-one million, four hundred ten thousand, twenty-one".