21000310201311 has 32 divisors (see below), whose sum is σ = 34311750359040. Its totient is φ = 11151318836736.

The previous prime is 21000310201267. The next prime is 21000310201369. The reversal of 21000310201311 is 11310201300012.

It is a happy number.

It is not a de Polignac number, because 21000310201311 - 2¹¹ = 21000310199263 is a prime.

It is a super-2 number, since 2×21000310201311² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21000310221311) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 372278116 + ... + 372334521.

It is an arithmetic number, because the mean of its divisors is an integer number (1072242198720).

Almost surely, 2^{21000310201311} is an apocalyptic number.

21000310201311 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

21000310201311 is a deficient number, since it is larger than the sum of its proper divisors (13311440157729).

21000310201311 is a wasteful number, since it uses less digits than its factorization.

21000310201311 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 744612743.

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

Adding to 21000310201311 its reverse (11310201300012), we get a palindrome (32310511501323).

The spelling of 21000310201311 in words is "twenty-one trillion, three hundred ten million, two hundred one thousand, three hundred eleven".