21023311032011 has 8 divisors (see below), whose sum is σ = 21430410889680. Its totient is φ = 20616597604512.

The previous prime is 21023311032001. The next prime is 21023311032019. The reversal of 21023311032011 is 11023011332012.

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 21023311032011 - 2²² = 21023306837707 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21023311032019) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 96497681 + ... + 96715298.

It is an arithmetic number, because the mean of its divisors is an integer number (2678801361210).

Almost surely, 2^{21023311032011} is an apocalyptic number.

21023311032011 is a deficient number, since it is larger than the sum of its proper divisors (407099857669).

21023311032011 is a wasteful number, since it uses less digits than its factorization.

21023311032011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 193215085.

The product of its (nonzero) digits is 216, while the sum is 20.

Adding to 21023311032011 its reverse (11023011332012), we get a palindrome (32046322364023).

The spelling of 21023311032011 in words is "twenty-one trillion, twenty-three billion, three hundred eleven million, thirty-two thousand, eleven".