71043555121 has 16 divisors (see below), whose sum is σ = 88758743040. Its totient is φ = 55243014480.

The previous prime is 71043555103. The next prime is 71043555131. The reversal of 71043555121 is 12155534017.

It is a cyclic number.

It is not a de Polignac number, because 71043555121 - 2⁷ = 71043554993 is a prime.

It is not an unprimeable number, because it can be changed into a prime (71043555131) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 926211 + ... + 999976.

It is an arithmetic number, because the mean of its divisors is an integer number (5547421440).

Almost surely, 2^71043555121 is an apocalyptic number.

It is an amenable number.

71043555121 is a deficient number, since it is larger than the sum of its proper divisors (17715187919).

71043555121 is a wasteful number, since it uses less digits than its factorization.

71043555121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1926684.

The product of its (nonzero) digits is 21000, while the sum is 34.

The spelling of 71043555121 in words is "seventy-one billion, forty-three million, five hundred fifty-five thousand, one hundred twenty-one".