23430211221 has 16 divisors (see below), whose sum is σ = 31835255040. Its totient is φ = 15322756800.

The previous prime is 23430211213. The next prime is 23430211229. The reversal of 23430211221 is 12211203432.

It is an interprime number because it is at equal distance from previous prime (23430211213) and next prime (23430211229).

It is not a de Polignac number, because 23430211221 - 2³ = 23430211213 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23430211229) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1377871 + ... + 1394771.

It is an arithmetic number, because the mean of its divisors is an integer number (1989703440).

Almost surely, 2^23430211221 is an apocalyptic number.

It is an amenable number.

23430211221 is a deficient number, since it is larger than the sum of its proper divisors (8405043819).

23430211221 is a wasteful number, since it uses less digits than its factorization.

23430211221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25676.

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

Adding to 23430211221 its reverse (12211203432), we get a palindrome (35641414653).

The spelling of 23430211221 in words is "twenty-three billion, four hundred thirty million, two hundred eleven thousand, two hundred twenty-one".