21271333045 has 8 divisors (see below), whose sum is σ = 27027105624. Its totient is φ = 16016062464.

The previous prime is 21271333019. The next prime is 21271333103. The reversal of 21271333045 is 54033317212.

It can be written as a sum of positive squares in 4 ways, for example, as 2785939524 + 18485393521 = 52782^2 + 135961^2 .

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21271333045 is a prime.

It is a super-2 number, since 2×21271333045² (a number of 21 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 = 21271332998 and 21271333016.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 125125404 + ... + 125125573.

It is an arithmetic number, because the mean of its divisors is an integer number (3378388203).

Almost surely, 2^21271333045 is an apocalyptic number.

It is an amenable number.

21271333045 is a deficient number, since it is larger than the sum of its proper divisors (5755772579).

21271333045 is a wasteful number, since it uses less digits than its factorization.

21271333045 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 250250999.

The product of its (nonzero) digits is 15120, while the sum is 31.

The spelling of 21271333045 in words is "twenty-one billion, two hundred seventy-one million, three hundred thirty-three thousand, forty-five".