21010000311 has 6 divisors (see below), whose sum is σ = 30347778240. Its totient is φ = 14006666868.

The previous prime is 21010000261. The next prime is 21010000327. The reversal of 21010000311 is 11300001012.

It is not a de Polignac number, because 21010000311 - 2²¹ = 21007903159 is a prime.

It is a super-2 number, since 2×21010000311² (a number of 21 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (9), and also a Moran number because the ratio is a prime number: 2334444479 = 21010000311 / (2 + 1 + 0 + 1 + 0 + 0 + 0 + 0 + 3 + 1 + 1).

It is a junction number, because it is equal to n+sod(n) for n = 21010000293 and 21010000302.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21010000111) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1167222231 + ... + 1167222248.

It is an arithmetic number, because the mean of its divisors is an integer number (5057963040).

Almost surely, 2^21010000311 is an apocalyptic number.

21010000311 is a deficient number, since it is larger than the sum of its proper divisors (9337777929).

21010000311 is a wasteful number, since it uses less digits than its factorization.

21010000311 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2334444485 (or 2334444482 counting only the distinct ones).

The product of its (nonzero) digits is 6, while the sum is 9.

Adding to 21010000311 its reverse (11300001012), we get a palindrome (32310001323).

The spelling of 21010000311 in words is "twenty-one billion, ten million, three hundred eleven", and thus it is an aban number.