21071341223543 has 6 divisors (see below), whose sum is σ = 22816896117984. Its totient is φ = 19450468821576.

The previous prime is 21071341223539. The next prime is 21071341223549. The reversal of 21071341223543 is 34532214317012.

It is not a de Polignac number, because 21071341223543 - 2² = 21071341223539 is a prime.

It is a super-2 number, since 2×21071341223543² (a number of 27 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 = 21071341223497 and 21071341223506.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21071341223549) 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, 62341246055 + ... + 62341246392.

It is an arithmetic number, because the mean of its divisors is an integer number (3802816019664).

Almost surely, 2^{21071341223543} is an apocalyptic number.

21071341223543 is a deficient number, since it is larger than the sum of its proper divisors (1745554894441).

21071341223543 is a wasteful number, since it uses less digits than its factorization.

21071341223543 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 124682492473 (or 124682492460 counting only the distinct ones).

The product of its (nonzero) digits is 120960, while the sum is 38.

The spelling of 21071341223543 in words is "twenty-one trillion, seventy-one billion, three hundred forty-one million, two hundred twenty-three thousand, five hundred forty-three".