23210001021 has 8 divisors (see below), whose sum is σ = 30964031680. Its totient is φ = 15464652192.

The previous prime is 23210001013. The next prime is 23210001037. The reversal of 23210001021 is 12010001232.

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

It is not a de Polignac number, because 23210001021 - 2³ = 23210001013 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 23210000988 and 23210001006.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23210001421) 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, 2164216 + ... + 2174913.

It is an arithmetic number, because the mean of its divisors is an integer number (3870503960).

Almost surely, 2^23210001021 is an apocalyptic number.

It is an amenable number.

23210001021 is a deficient number, since it is larger than the sum of its proper divisors (7754030659).

23210001021 is a wasteful number, since it uses less digits than its factorization.

23210001021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4340915.

The product of its (nonzero) digits is 24, while the sum is 12.

Adding to 23210001021 its reverse (12010001232), we get a palindrome (35220002253).

The spelling of 23210001021 in words is "twenty-three billion, two hundred ten million, one thousand, twenty-one".