21130401343 has 4 divisors (see below), whose sum is σ = 21130880248. Its totient is φ = 21129922440.

The previous prime is 21130401293. The next prime is 21130401359. The reversal of 21130401343 is 34310403112.

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 21130401343 - 2³³ = 12540466751 is a prime.

It is a super-3 number, since 3×21130401343³ (a number of 32 digits) contains 333 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 (21130401143) 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, 165696 + ... + 264037.

It is an arithmetic number, because the mean of its divisors is an integer number (5282720062).

Almost surely, 2^21130401343 is an apocalyptic number.

21130401343 is a deficient number, since it is larger than the sum of its proper divisors (478905).

21130401343 is an equidigital number, since it uses as much as digits as its factorization.

21130401343 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 478904.

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

Adding to 21130401343 its reverse (34310403112), we get a palindrome (55440804455).

The spelling of 21130401343 in words is "twenty-one billion, one hundred thirty million, four hundred one thousand, three hundred forty-three".