71033121 has 24 divisors (see below), whose sum is σ = 108186624. Its totient is φ = 44844480.

The previous prime is 71033117. The next prime is 71033129. The reversal of 71033121 is 12133017.

It is not a de Polignac number, because 71033121 - 2² = 71033117 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 71033094 and 71033103.

It is not an unprimeable number, because it can be changed into a prime (71033129) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 10405 + ... + 15821.

It is an arithmetic number, because the mean of its divisors is an integer number (4507776).

Almost surely, 2^71033121 is an apocalyptic number.

It is an amenable number.

71033121 is a deficient number, since it is larger than the sum of its proper divisors (37153503).

71033121 is a wasteful number, since it uses less digits than its factorization.

71033121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5501 (or 5498 counting only the distinct ones).

The product of its (nonzero) digits is 126, while the sum is 18.

The square root of 71033121 is about 8428.1149137871. The cubic root of 71033121 is about 414.1461536766.

Adding to 71033121 its reverse (12133017), we get a palindrome (83166138).

The spelling of 71033121 in words is "seventy-one million, thirty-three thousand, one hundred twenty-one".