23100121332221 has 4 divisors (see below), whose sum is σ = 23100134158812. Its totient is φ = 23100108505632.

The previous prime is 23100121332187. The next prime is 23100121332227. The reversal of 23100121332221 is 12223312100132.

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 12039581436100 + 11060539896121 = 3469810^2 + 3325739^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-23100121332221 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23100121332227) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3162656 + ... + 7496841.

It is an arithmetic number, because the mean of its divisors is an integer number (5775033539703).

Almost surely, 2^{23100121332221} is an apocalyptic number.

It is an amenable number.

23100121332221 is a deficient number, since it is larger than the sum of its proper divisors (12826591).

23100121332221 is a wasteful number, since it uses less digits than its factorization.

23100121332221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12826590.

The product of its (nonzero) digits is 864, while the sum is 23.

Adding to 23100121332221 its reverse (12223312100132), we get a palindrome (35323433432353).

The spelling of 23100121332221 in words is "twenty-three trillion, one hundred billion, one hundred twenty-one million, three hundred thirty-two thousand, two hundred twenty-one".