21101023301021 has 8 divisors (see below), whose sum is σ = 21119967065088. Its totient is φ = 21082080600000.

The previous prime is 21101023300997. The next prime is 21101023301051. The reversal of 21101023301021 is 12010332010112.

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 21101023301021 - 2⁶ = 21101023300957 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 (21101023301051) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 42537221 + ... + 43030421.

It is an arithmetic number, because the mean of its divisors is an integer number (2639995883136).

Almost surely, 2^{21101023301021} is an apocalyptic number.

It is an amenable number.

21101023301021 is a deficient number, since it is larger than the sum of its proper divisors (18943764067).

21101023301021 is a wasteful number, since it uses less digits than its factorization.

21101023301021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 531523.

The product of its (nonzero) digits is 72, while the sum is 17.

Adding to 21101023301021 its reverse (12010332010112), we get a palindrome (33111355311133).

The spelling of 21101023301021 in words is "twenty-one trillion, one hundred one billion, twenty-three million, three hundred one thousand, twenty-one".