21010301311 has 4 divisors (see below), whose sum is σ = 21100474512. Its totient is φ = 20920128112.

The previous prime is 21010301281. The next prime is 21010301357. The reversal of 21010301311 is 11310301012.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 21010301311 - 2²¹ = 21008204159 is a prime.

It is a super-2 number, since 2×21010301311² (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 = 21010301291 and 21010301300.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21010301381) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 45086251 + ... + 45086716.

It is an arithmetic number, because the mean of its divisors is an integer number (5275118628).

Almost surely, 2^21010301311 is an apocalyptic number.

21010301311 is a deficient number, since it is larger than the sum of its proper divisors (90173201).

21010301311 is an equidigital number, since it uses as much as digits as its factorization.

21010301311 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 90173200.

The product of its (nonzero) digits is 18, while the sum is 13.

Adding to 21010301311 its reverse (11310301012), we get a palindrome (32320602323).

The spelling of 21010301311 in words is "twenty-one billion, ten million, three hundred one thousand, three hundred eleven".