71217120133 has 4 divisors (see below), whose sum is σ = 71219974860. Its totient is φ = 71214265408.

The previous prime is 71217120077. The next prime is 71217120151. The reversal of 71217120133 is 33102171217.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 33102171217 = 10733 ⋅3084149.

It can be written as a sum of positive squares in 2 ways, for example, as 13675665249 + 57541454884 = 116943^2 + 239878^2 .

It is a cyclic number.

It is not a de Polignac number, because 71217120133 - 2⁹ = 71217119621 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 (71217120173) 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, 1389610 + ... + 1439947.

It is an arithmetic number, because the mean of its divisors is an integer number (17804993715).

Almost surely, 2^71217120133 is an apocalyptic number.

It is an amenable number.

71217120133 is a deficient number, since it is larger than the sum of its proper divisors (2854727).

71217120133 is a wasteful number, since it uses less digits than its factorization.

71217120133 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2854726.

The product of its (nonzero) digits is 1764, while the sum is 28.

The spelling of 71217120133 in words is "seventy-one billion, two hundred seventeen million, one hundred twenty thousand, one hundred thirty-three".