21400343311 has 8 divisors (see below), whose sum is σ = 21525869664. Its totient is φ = 21275105280.

The previous prime is 21400343299. The next prime is 21400343351. The reversal of 21400343311 is 11334300412.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 21400343311 - 2²¹ = 21398246159 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21400343351) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 77710 + ... + 220996.

It is an arithmetic number, because the mean of its divisors is an integer number (2690733708).

Almost surely, 2^21400343311 is an apocalyptic number.

21400343311 is a deficient number, since it is larger than the sum of its proper divisors (125526353).

21400343311 is a wasteful number, since it uses less digits than its factorization.

21400343311 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 144161.

The product of its (nonzero) digits is 864, while the sum is 22.

Adding to 21400343311 its reverse (11334300412), we get a palindrome (32734643723).

The spelling of 21400343311 in words is "twenty-one billion, four hundred million, three hundred forty-three thousand, three hundred eleven".