23121020305 has 16 divisors (see below), whose sum is σ = 28180690560. Its totient is φ = 18208339072.

The previous prime is 23121020303. The next prime is 23121020311. The reversal of 23121020305 is 50302012132.

It is a cyclic number.

It is not a de Polignac number, because 23121020305 - 2¹ = 23121020303 is a prime.

It is not an unprimeable number, because it can be changed into a prime (23121020303) 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, 13429 + ... + 215458.

It is an arithmetic number, because the mean of its divisors is an integer number (1761293160).

Almost surely, 2^23121020305 is an apocalyptic number.

It is an amenable number.

23121020305 is a deficient number, since it is larger than the sum of its proper divisors (5059670255).

23121020305 is a wasteful number, since it uses less digits than its factorization.

23121020305 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 229208.

The product of its (nonzero) digits is 360, while the sum is 19.

Adding to 23121020305 its reverse (50302012132), we get a palindrome (73423032437).

The spelling of 23121020305 in words is "twenty-three billion, one hundred twenty-one million, twenty thousand, three hundred five".