23021023021 has 8 divisors (see below), whose sum is σ = 23252312088. Its totient is φ = 22789800000.

The previous prime is 23021023013. The next prime is 23021023027. The reversal of 23021023021 is 12032012032.

It can be written as a sum of positive squares in 4 ways, for example, as 11106208996 + 11914814025 = 105386^2 + 109155^2 .

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 23021023021 - 2³ = 23021023013 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 23021022986 and 23021023004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23021023027) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 988491 + ... + 1011511.

It is an arithmetic number, because the mean of its divisors is an integer number (2906539011).

Almost surely, 2^23021023021 is an apocalyptic number.

It is an amenable number.

23021023021 is a deficient number, since it is larger than the sum of its proper divisors (231289067).

23021023021 is a wasteful number, since it uses less digits than its factorization.

23021023021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33023.

The product of its (nonzero) digits is 144, while the sum is 16.

Adding to 23021023021 its reverse (12032012032), we get a palindrome (35053035053).

The spelling of 23021023021 in words is "twenty-three billion, twenty-one million, twenty-three thousand, twenty-one".