21230023220121 has 16 divisors (see below), whose sum is σ = 28705667995008. Its totient is φ = 13953867580800.

The previous prime is 21230023220089. The next prime is 21230023220141. The reversal of 21230023220121 is 12102232003212.

It is not a de Polignac number, because 21230023220121 - 2⁵ = 21230023220089 is a prime.

It is not an unprimeable number, because it can be changed into a prime (21230023220141) 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, 23861541 + ... + 24735261.

It is an arithmetic number, because the mean of its divisors is an integer number (1794104249688).

Almost surely, 2^{21230023220121} is an apocalyptic number.

It is an amenable number.

21230023220121 is a deficient number, since it is larger than the sum of its proper divisors (7475644774887).

21230023220121 is a wasteful number, since it uses less digits than its factorization.

21230023220121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 987872.

The product of its (nonzero) digits is 576, while the sum is 21.

Adding to 21230023220121 its reverse (12102232003212), we get a palindrome (33332255223333).

The spelling of 21230023220121 in words is "twenty-one trillion, two hundred thirty billion, twenty-three million, two hundred twenty thousand, one hundred twenty-one".