21313332011 has 8 divisors (see below), whose sum is σ = 21636925440. Its totient is φ = 20989900008.

The previous prime is 21313331957. The next prime is 21313332013. The reversal of 21313332011 is 11023331312.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21313332011 is a prime.

It is a super-2 number, since 2×21313332011² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21313332013) 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, 240410 + ... + 316896.

It is an arithmetic number, because the mean of its divisors is an integer number (2704615680).

Almost surely, 2^21313332011 is an apocalyptic number.

21313332011 is a deficient number, since it is larger than the sum of its proper divisors (323593429).

21313332011 is an equidigital number, since it uses as much as digits as its factorization.

21313332011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 80713.

The product of its (nonzero) digits is 324, while the sum is 20.

Adding to 21313332011 its reverse (11023331312), we get a palindrome (32336663323).

The spelling of 21313332011 in words is "twenty-one billion, three hundred thirteen million, three hundred thirty-two thousand, eleven".