71022752121 has 4 divisors (see below), whose sum is σ = 94697002832. Its totient is φ = 47348501412.

The previous prime is 71022752111. The next prime is 71022752179. The reversal of 71022752121 is 12125722017.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 71022752121 - 2⁶ = 71022752057 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (71022752111) 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, 11837125351 + ... + 11837125356.

It is an arithmetic number, because the mean of its divisors is an integer number (23674250708).

Almost surely, 2^71022752121 is an apocalyptic number.

It is an amenable number.

71022752121 is a deficient number, since it is larger than the sum of its proper divisors (23674250711).

71022752121 is a wasteful number, since it uses less digits than its factorization.

71022752121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23674250710.

The product of its (nonzero) digits is 3920, while the sum is 30.

The spelling of 71022752121 in words is "seventy-one billion, twenty-two million, seven hundred fifty-two thousand, one hundred twenty-one".