23012021 has 8 divisors (see below), whose sum is σ = 24586080. Its totient is φ = 21474288.

The previous prime is 23011997. The next prime is 23012047. The reversal of 23012021 is 12021032.

It is a happy number.

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 23012021 - 2⁶ = 23011957 is a prime.

It is a super-2 number, since 2×23012021² = 1059106221008882, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 23011993 and 23012011.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23012221) 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, 7766 + ... + 10311.

It is an arithmetic number, because the mean of its divisors is an integer number (3073260).

Almost surely, 2^23012021 is an apocalyptic number.

It is an amenable number.

23012021 is a deficient number, since it is larger than the sum of its proper divisors (1574059).

23012021 is a wasteful number, since it uses less digits than its factorization.

23012021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18163.

The product of its (nonzero) digits is 24, while the sum is 11.

The square root of 23012021 is about 4797.0846354843. The cubic root of 23012021 is about 284.4362344647.

Adding to 23012021 its reverse (12021032), we get a palindrome (35033053).

The spelling of 23012021 in words is "twenty-three million, twelve thousand, twenty-one".