71279470121 has 16 divisors (see below), whose sum is σ = 75570800640. Its totient is φ = 67042630800.

The previous prime is 71279470109. The next prime is 71279470193. The reversal of 71279470121 is 12107497217.

It is a cyclic number.

It is not a de Polignac number, because 71279470121 - 2⁶ = 71279470057 is a prime.

It is not an unprimeable number, because it can be changed into a prime (71279470021) 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, 5912726 + ... + 5924768.

It is an arithmetic number, because the mean of its divisors is an integer number (4723175040).

Almost surely, 2^71279470121 is an apocalyptic number.

It is an amenable number.

71279470121 is a deficient number, since it is larger than the sum of its proper divisors (4291330519).

71279470121 is a wasteful number, since it uses less digits than its factorization.

71279470121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14276.

The product of its (nonzero) digits is 49392, while the sum is 41.

The spelling of 71279470121 in words is "seventy-one billion, two hundred seventy-nine million, four hundred seventy thousand, one hundred twenty-one".