21011302311 has 8 divisors (see below), whose sum is σ = 28037869680. Its totient is φ = 13996134912.

The previous prime is 21011302271. The next prime is 21011302321. The reversal of 21011302311 is 11320311012.

It is a happy number.

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

It is not a de Polignac number, because 21011302311 - 2¹⁰ = 21011301287 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21011302321) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2845690 + ... + 2853063.

It is an arithmetic number, because the mean of its divisors is an integer number (3504733710).

Almost surely, 2^21011302311 is an apocalyptic number.

21011302311 is a deficient number, since it is larger than the sum of its proper divisors (7026567369).

21011302311 is a wasteful number, since it uses less digits than its factorization.

21011302311 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5699985.

The product of its (nonzero) digits is 36, while the sum is 15.

Adding to 21011302311 its reverse (11320311012), we get a palindrome (32331613323).

The spelling of 21011302311 in words is "twenty-one billion, eleven million, three hundred two thousand, three hundred eleven".