106871506421 has 2 divisors, whose sum is σ = 106871506422. Its totient is φ = 106871506420.

The previous prime is 106871506397. The next prime is 106871506439. The reversal of 106871506421 is 124605178601.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 58220381521 + 48651124900 = 241289^2 + 220570^2 .

It is a cyclic number.

It is not a de Polignac number, because 106871506421 - 2²² = 106867312117 is a prime.

It is a super-2 number, since 2×106871506421² (a number of 23 digits) contains 22 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (106871502421) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 53435753210 + 53435753211.

It is an arithmetic number, because the mean of its divisors is an integer number (53435753211).

Almost surely, 2^106871506421 is an apocalyptic number.

It is an amenable number.

106871506421 is a deficient number, since it is larger than the sum of its proper divisors (1).

106871506421 is an equidigital number, since it uses as much as digits as its factorization.

106871506421 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 80640, while the sum is 41.

The spelling of 106871506421 in words is "one hundred six billion, eight hundred seventy-one million, five hundred six thousand, four hundred twenty-one".