21000300311 has 12 divisors (see below), whose sum is σ = 22827088152. Its totient is φ = 19305326208.

The previous prime is 21000300301. The next prime is 21000300313. The reversal of 21000300311 is 11300300012.

It is not a de Polignac number, because 21000300311 - 2¹⁸ = 21000038167 is a prime.

It is a super-2 number, since 2×21000300311² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 21000300292 and 21000300301.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21000300313) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 832520 + ... + 857373.

It is an arithmetic number, because the mean of its divisors is an integer number (1902257346).

Almost surely, 2^21000300311 is an apocalyptic number.

21000300311 is a deficient number, since it is larger than the sum of its proper divisors (1826787841).

21000300311 is a wasteful number, since it uses less digits than its factorization.

21000300311 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1689970 (or 1689953 counting only the distinct ones).

The product of its (nonzero) digits is 18, while the sum is 11.

Adding to 21000300311 its reverse (11300300012), we get a palindrome (32300600323).

The spelling of 21000300311 in words is "twenty-one billion, three hundred thousand, three hundred eleven".