23021203021 has 4 divisors (see below), whose sum is σ = 24375391452. Its totient is φ = 21667014592.

The previous prime is 23021203019. The next prime is 23021203133. The reversal of 23021203021 is 12030212032.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 19301544900 + 3719658121 = 138930^2 + 60989^2 .

It is a cyclic number.

It is not a de Polignac number, because 23021203021 - 2¹ = 23021203019 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 23021202986 and 23021203004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23021203421) 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 3 ways as a sum of consecutive naturals, for example, 677094190 + ... + 677094223.

It is an arithmetic number, because the mean of its divisors is an integer number (6093847863).

Almost surely, 2^23021203021 is an apocalyptic number.

It is an amenable number.

23021203021 is a deficient number, since it is larger than the sum of its proper divisors (1354188431).

23021203021 is a wasteful number, since it uses less digits than its factorization.

23021203021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1354188430.

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

Adding to 23021203021 its reverse (12030212032), we get a palindrome (35051415053).

The spelling of 23021203021 in words is "twenty-three billion, twenty-one million, two hundred three thousand, twenty-one".