23122021 has 8 divisors (see below), whose sum is σ = 24994424. Its totient is φ = 21263040.

The previous prime is 23122007. The next prime is 23122027. The reversal of 23122021 is 12022132.

It can be written as a sum of positive squares in 4 ways, for example, as 216225 + 22905796 = 465^2 + 4786^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 23122021 - 2¹¹ = 23119973 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (13).

It is a junction number, because it is equal to n+sod(n) for n = 23121992 and 23122010.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23122027) 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, 391 + ... + 6811.

It is an arithmetic number, because the mean of its divisors is an integer number (3124303).

Almost surely, 2^23122021 is an apocalyptic number.

It is an amenable number.

23122021 is a deficient number, since it is larger than the sum of its proper divisors (1872403).

23122021 is a wasteful number, since it uses less digits than its factorization.

23122021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6711.

The product of its (nonzero) digits is 48, while the sum is 13.

The square root of 23122021 is about 4808.5362637709. The cubic root of 23122021 is about 284.8887264386. Note that the first 3 decimals are identical.

Adding to 23122021 its reverse (12022132), we get a palindrome (35144153).

The spelling of 23122021 in words is "twenty-three million, one hundred twenty-two thousand, twenty-one".