21014001311 has 16 divisors (see below), whose sum is σ = 22237843200. Its totient is φ = 19802112768.

The previous prime is 21014001299. The next prime is 21014001361. The reversal of 21014001311 is 11310041012.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21014001311 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21014001361) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8102831 + ... + 8105423.

It is an arithmetic number, because the mean of its divisors is an integer number (1389865200).

Almost surely, 2^21014001311 is an apocalyptic number.

21014001311 is a deficient number, since it is larger than the sum of its proper divisors (1223841889).

21014001311 is a wasteful number, since it uses less digits than its factorization.

21014001311 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4718.

The product of its (nonzero) digits is 24, while the sum is 14.

Adding to 21014001311 its reverse (11310041012), we get a palindrome (32324042323).

The spelling of 21014001311 in words is "twenty-one billion, fourteen million, one thousand, three hundred eleven".