21271134503 has 8 divisors (see below), whose sum is σ = 21622793136. Its totient is φ = 20919571200.

The previous prime is 21271134497. The next prime is 21271134517. The reversal of 21271134503 is 30543117212.

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 21271134503 - 2²⁶ = 21204025639 is a prime.

It is a super-2 number, since 2×21271134503² (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 (21271134523) 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, 532343 + ... + 570903.

It is an arithmetic number, because the mean of its divisors is an integer number (2702849142).

Almost surely, 2^21271134503 is an apocalyptic number.

21271134503 is a deficient number, since it is larger than the sum of its proper divisors (351658633).

21271134503 is an equidigital number, since it uses as much as digits as its factorization.

21271134503 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 47665.

The product of its (nonzero) digits is 5040, while the sum is 29.

The spelling of 21271134503 in words is "twenty-one billion, two hundred seventy-one million, one hundred thirty-four thousand, five hundred three".