23400221210421 has 16 divisors (see below), whose sum is σ = 36038843362368. Its totient is φ = 13347719763200.

The previous prime is 23400221210369. The next prime is 23400221210467. The reversal of 23400221210421 is 12401212200432.

It is a cyclic number.

It is not a de Polignac number, because 23400221210421 - 2¹⁰ = 23400221209397 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 23400221210391 and 23400221210400.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23400221210021) 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, 20855811570 + ... + 20855812691.

It is an arithmetic number, because the mean of its divisors is an integer number (2252427710148).

Almost surely, 2^{23400221210421} is an apocalyptic number.

It is an amenable number.

23400221210421 is a deficient number, since it is larger than the sum of its proper divisors (12638622151947).

23400221210421 is a wasteful number, since it uses less digits than its factorization.

23400221210421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41711624292.

The product of its (nonzero) digits is 1536, while the sum is 24.

Adding to 23400221210421 its reverse (12401212200432), we get a palindrome (35801433410853).

The spelling of 23400221210421 in words is "twenty-three trillion, four hundred billion, two hundred twenty-one million, two hundred ten thousand, four hundred twenty-one".