3871174607021 has 2 divisors, whose sum is σ = 3871174607022. Its totient is φ = 3871174607020.

The previous prime is 3871174607017. The next prime is 3871174607023. The reversal of 3871174607021 is 1207064711783.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2961878862121 + 909295744900 = 1721011^2 + 953570^2 .

It is a cyclic number.

It is not a de Polignac number, because 3871174607021 - 2² = 3871174607017 is a prime.

Together with 3871174607023, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (3871174607023) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1935587303510 + 1935587303511.

It is an arithmetic number, because the mean of its divisors is an integer number (1935587303511).

Almost surely, 2^{3871174607021} is an apocalyptic number.

It is an amenable number.

3871174607021 is a deficient number, since it is larger than the sum of its proper divisors (1).

3871174607021 is an equidigital number, since it uses as much as digits as its factorization.

3871174607021 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 395136, while the sum is 47.

The spelling of 3871174607021 in words is "three trillion, eight hundred seventy-one billion, one hundred seventy-four million, six hundred seven thousand, twenty-one".