21012002003311 has 16 divisors (see below), whose sum is σ = 23354948972160. Its totient is φ = 18741190892320.

The previous prime is 21012002003281. The next prime is 21012002003323. The reversal of 21012002003311 is 11330020021012.

It is a cyclic number.

It is not a de Polignac number, because 21012002003311 - 2⁹ = 21012002002799 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21012002003011) 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, 70699620 + ... + 70996198.

It is an arithmetic number, because the mean of its divisors is an integer number (1459684310760).

Almost surely, 2^{21012002003311} is an apocalyptic number.

21012002003311 is a deficient number, since it is larger than the sum of its proper divisors (2342946968849).

21012002003311 is a wasteful number, since it uses less digits than its factorization.

21012002003311 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 418166.

The product of its (nonzero) digits is 72, while the sum is 16.

Adding to 21012002003311 its reverse (11330020021012), we get a palindrome (32342022024323).

The spelling of 21012002003311 in words is "twenty-one trillion, twelve billion, two million, three thousand, three hundred eleven".