21311200002011 has 16 divisors (see below), whose sum is σ = 23157764567040. Its totient is φ = 19537199818560.

The previous prime is 21311200001899. The next prime is 21311200002031. The reversal of 21311200002011 is 11020000211312.

It is a cyclic number.

It is not a de Polignac number, because 21311200002011 - 2²⁶ = 21311132893147 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21311200002031) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 9740591 + ... + 11726103.

It is an arithmetic number, because the mean of its divisors is an integer number (1447360285440).

Almost surely, 2^{21311200002011} is an apocalyptic number.

21311200002011 is a deficient number, since it is larger than the sum of its proper divisors (1846564565029).

21311200002011 is a wasteful number, since it uses less digits than its factorization.

21311200002011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2003786.

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

Adding to 21311200002011 its reverse (11020000211312), we get a palindrome (32331200213323).

The spelling of 21311200002011 in words is "twenty-one trillion, three hundred eleven billion, two hundred million, two thousand, eleven".