21101103231011 has 8 divisors (see below), whose sum is σ = 21565143462720. Its totient is φ = 20637691357248.

The previous prime is 21101103230989. The next prime is 21101103231017. The reversal of 21101103231011 is 11013230110112.

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 21101103231011 - 2¹⁸ = 21101102968867 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21101103231017) 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, 157021586 + ... + 157155911.

It is an arithmetic number, because the mean of its divisors is an integer number (2695642932840).

Almost surely, 2^{21101103231011} is an apocalyptic number.

21101103231011 is a deficient number, since it is larger than the sum of its proper divisors (464040231709).

21101103231011 is a wasteful number, since it uses less digits than its factorization.

21101103231011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 314178973.

The product of its (nonzero) digits is 36, while the sum is 17.

Adding to 21101103231011 its reverse (11013230110112), we get a palindrome (32114333341123).

The spelling of 21101103231011 in words is "twenty-one trillion, one hundred one billion, one hundred three million, two hundred thirty-one thousand, eleven".