71162121051 has 16 divisors (see below), whose sum is σ = 120486131200. Its totient is φ = 40664069064.

The previous prime is 71162121031. The next prime is 71162121073. The reversal of 71162121051 is 15012126117.

71162121051 is a `hidden beast` number, since 7 + 11 + 621 + 21 + 0 + 5 + 1 = 666.

It is not a de Polignac number, because 71162121051 - 2⁹ = 71162120539 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (71162121011) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 188259391 + ... + 188259768.

It is an arithmetic number, because the mean of its divisors is an integer number (7530383200).

Almost surely, 2^71162121051 is an apocalyptic number.

71162121051 is a deficient number, since it is larger than the sum of its proper divisors (49324010149).

71162121051 is a wasteful number, since it uses less digits than its factorization.

71162121051 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 376519175 (or 376519169 counting only the distinct ones).

The product of its (nonzero) digits is 840, while the sum is 27.

Adding to 71162121051 its reverse (15012126117), we get a palindrome (86174247168).

The spelling of 71162121051 in words is "seventy-one billion, one hundred sixty-two million, one hundred twenty-one thousand, fifty-one".