71000092000021 has 16 divisors (see below), whose sum is σ = 71746139142000. Its totient is φ = 70254898560000.

The previous prime is 71000092000009. The next prime is 71000092000039. The reversal of 71000092000021 is 12000029000017.

It can be written as a sum of positive squares in 8 ways, for example, as 34151003580996 + 36849088419025 = 5843886^2 + 6070345^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-71000092000021 is a prime.

It is a super-2 number, since 2×71000092000021² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 71000091999956 and 71000092000001.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (71000092006021) 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, 2128985455 + ... + 2129018803.

It is an arithmetic number, because the mean of its divisors is an integer number (4484133696375).

Almost surely, 2^{71000092000021} is an apocalyptic number.

It is an amenable number.

71000092000021 is a deficient number, since it is larger than the sum of its proper divisors (746047141979).

71000092000021 is a wasteful number, since it uses less digits than its factorization.

71000092000021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45480.

The product of its (nonzero) digits is 252, while the sum is 22.

The spelling of 71000092000021 in words is "seventy-one trillion, ninety-two million, twenty-one", and thus it is an aban number and an uban number.