21230034221 has 8 divisors (see below), whose sum is σ = 23164502688. Its totient is φ = 19296310000.

The previous prime is 21230034193. The next prime is 21230034239. The reversal of 21230034221 is 12243003212.

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

It is not a de Polignac number, because 21230034221 - 2¹⁸ = 21229772077 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 21230034193 and 21230034202.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21230034281) 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, 125555 + ... + 241296.

It is an arithmetic number, because the mean of its divisors is an integer number (2895562836).

Almost surely, 2^21230034221 is an apocalyptic number.

It is an amenable number.

21230034221 is a deficient number, since it is larger than the sum of its proper divisors (1934468467).

21230034221 is a wasteful number, since it uses less digits than its factorization.

21230034221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 372123.

The product of its (nonzero) digits is 576, while the sum is 20.

Adding to 21230034221 its reverse (12243003212), we get a palindrome (33473037433).

The spelling of 21230034221 in words is "twenty-one billion, two hundred thirty million, thirty-four thousand, two hundred twenty-one".