21333102031011 has 4 divisors (see below), whose sum is σ = 28444136041352. Its totient is φ = 14222068020672.

The previous prime is 21333102031009. The next prime is 21333102031027. The reversal of 21333102031011 is 11013020133312.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 21333102031011 - 2¹ = 21333102031009 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21333102031001) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3555517005166 + ... + 3555517005171.

It is an arithmetic number, because the mean of its divisors is an integer number (7111034010338).

Almost surely, 2^{21333102031011} is an apocalyptic number.

21333102031011 is a deficient number, since it is larger than the sum of its proper divisors (7111034010341).

21333102031011 is an equidigital number, since it uses as much as digits as its factorization.

21333102031011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7111034010340.

The product of its (nonzero) digits is 324, while the sum is 21.

Adding to 21333102031011 its reverse (11013020133312), we get a palindrome (32346122164323).

The spelling of 21333102031011 in words is "twenty-one trillion, three hundred thirty-three billion, one hundred two million, thirty-one thousand, eleven".