21213301311 has 6 divisors (see below), whose sum is σ = 30641435240. Its totient is φ = 14142200868.

The previous prime is 21213301273. The next prime is 21213301349. The reversal of 21213301311 is 11310331212.

21213301311 is a `hidden beast` number, since 2 + 1 + 21 + 330 + 1 + 311 = 666.

It is an interprime number because it is at equal distance from previous prime (21213301273) and next prime (21213301349).

It is not a de Polignac number, because 21213301311 - 2¹⁸ = 21213039167 is a prime.

It is a super-2 number, since 2×21213301311² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21213301391) 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, 1178516731 + ... + 1178516748.

Almost surely, 2^21213301311 is an apocalyptic number.

21213301311 is a deficient number, since it is larger than the sum of its proper divisors (9428133929).

21213301311 is a wasteful number, since it uses less digits than its factorization.

21213301311 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2357033485 (or 2357033482 counting only the distinct ones).

The product of its (nonzero) digits is 108, while the sum is 18.

Adding to 21213301311 its reverse (11310331212), we get a palindrome (32523632523).

The spelling of 21213301311 in words is "twenty-one billion, two hundred thirteen million, three hundred one thousand, three hundred eleven".