71021562121161 has 48 divisors (see below), whose sum is σ = 103098838901760. Its totient is φ = 47111870746080.

The previous prime is 71021562121127. The next prime is 71021562121183. The reversal of 71021562121161 is 16112126512017.

71021562121161 is a `hidden beast` number, since 7 + 1 + 0 + 2 + 1 + 5 + 621 + 21 + 1 + 6 + 1 = 666.

It is not a de Polignac number, because 71021562121161 - 2¹⁷ = 71021561990089 is a prime.

It is a super-2 number, since 2×71021562121161² (a number of 29 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (71021562121121) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 6772337860 + ... + 6772348346.

It is an arithmetic number, because the mean of its divisors is an integer number (2147892477120).

Almost surely, 2^{71021562121161} is an apocalyptic number.

It is an amenable number.

71021562121161 is a deficient number, since it is larger than the sum of its proper divisors (32077276780599).

71021562121161 is a wasteful number, since it uses less digits than its factorization.

71021562121161 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14386 (or 14383 counting only the distinct ones).

The product of its (nonzero) digits is 10080, while the sum is 36.

Adding to 71021562121161 its reverse (16112126512017), we get a palindrome (87133688633178).

The spelling of 71021562121161 in words is "seventy-one trillion, twenty-one billion, five hundred sixty-two million, one hundred twenty-one thousand, one hundred sixty-one".