21101321101 has 8 divisors (see below), whose sum is σ = 24149815040. Its totient is φ = 18061332048.

The previous prime is 21101321099. The next prime is 21101321107. The reversal of 21101321101 is 10112310112.

It is a happy number.

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 21101321101 - 2¹ = 21101321099 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 (21101321107) 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, 2120901 + ... + 2130826.

It is an arithmetic number, because the mean of its divisors is an integer number (3018726880).

Almost surely, 2^21101321101 is an apocalyptic number.

It is an amenable number.

21101321101 is a deficient number, since it is larger than the sum of its proper divisors (3048493939).

21101321101 is an equidigital number, since it uses as much as digits as its factorization.

21101321101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4252443.

The product of its (nonzero) digits is 12, while the sum is 13.

Adding to 21101321101 its reverse (10112310112), we get a palindrome (31213631213).

The spelling of 21101321101 in words is "twenty-one billion, one hundred one million, three hundred twenty-one thousand, one hundred one".