21101223301021 has 8 divisors (see below), whose sum is σ = 21244631097600. Its totient is φ = 20957839356048.

The previous prime is 21101223301013. The next prime is 21101223301031. The reversal of 21101223301021 is 12010332210112.

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 21101223301021 - 2³ = 21101223301013 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 21101223301021.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21101223301001) 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 7 ways as a sum of consecutive naturals, for example, 4185721 + ... + 7728046.

It is an arithmetic number, because the mean of its divisors is an integer number (2655578887200).

Almost surely, 2^{21101223301021} is an apocalyptic number.

It is an amenable number.

21101223301021 is a deficient number, since it is larger than the sum of its proper divisors (143407796579).

21101223301021 is a wasteful number, since it uses less digits than its factorization.

21101223301021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11925803.

The product of its (nonzero) digits is 144, while the sum is 19.

Adding to 21101223301021 its reverse (12010332210112), we get a palindrome (33111555511133).

The spelling of 21101223301021 in words is "twenty-one trillion, one hundred one billion, two hundred twenty-three million, three hundred one thousand, twenty-one".