23120621 has 4 divisors (see below), whose sum is σ = 23217600. Its totient is φ = 23023644.

The previous prime is 23120611. The next prime is 23120623. The reversal of 23120621 is 12602132.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 23120621 - 2⁶ = 23120557 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 23120621.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23120623) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 48131 + ... + 48608.

It is an arithmetic number, because the mean of its divisors is an integer number (5804400).

Almost surely, 2^23120621 is an apocalyptic number.

It is an amenable number.

23120621 is a deficient number, since it is larger than the sum of its proper divisors (96979).

23120621 is an equidigital number, since it uses as much as digits as its factorization.

23120621 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 96978.

The product of its (nonzero) digits is 144, while the sum is 17.

The square root of 23120621 is about 4808.3906871218. The cubic root of 23120621 is about 284.8829764760.

Adding to 23120621 its reverse (12602132), we get a palindrome (35722753).

The spelling of 23120621 in words is "twenty-three million, one hundred twenty thousand, six hundred twenty-one".