23101222021 has 4 divisors (see below), whose sum is σ = 24460117452. Its totient is φ = 21742326592.

The previous prime is 23101221943. The next prime is 23101222033. The reversal of 23101222021 is 12022210132.

It is a happy number.

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 19891999521 + 3209222500 = 141039^2 + 56650^2 .

It is a cyclic number.

It is not a de Polignac number, because 23101222021 - 2⁹ = 23101221509 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 23101221986 and 23101222004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23101222051) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 679447690 + ... + 679447723.

It is an arithmetic number, because the mean of its divisors is an integer number (6115029363).

Almost surely, 2^23101222021 is an apocalyptic number.

It is an amenable number.

23101222021 is a deficient number, since it is larger than the sum of its proper divisors (1358895431).

23101222021 is a wasteful number, since it uses less digits than its factorization.

23101222021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1358895430.

The product of its (nonzero) digits is 96, while the sum is 16.

Adding to 23101222021 its reverse (12022210132), we get a palindrome (35123432153).

The spelling of 23101222021 in words is "twenty-three billion, one hundred one million, two hundred twenty-two thousand, twenty-one".