106508021 has 2 divisors, whose sum is σ = 106508022. Its totient is φ = 106508020.

The previous prime is 106507997. The next prime is 106508029. The reversal of 106508021 is 120805601.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 66994225 + 39513796 = 8185^2 + 6286^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-106508021 is a prime.

It is a super-2 number, since 2×106508021² = 22687917074672882, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (106508029) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 53254010 + 53254011.

It is an arithmetic number, because the mean of its divisors is an integer number (53254011).

Almost surely, 2^106508021 is an apocalyptic number.

It is an amenable number.

106508021 is a deficient number, since it is larger than the sum of its proper divisors (1).

106508021 is an equidigital number, since it uses as much as digits as its factorization.

106508021 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 480, while the sum is 23.

The square root of 106508021 is about 10320.2723316781. The cubic root of 106508021 is about 474.0172048922.

The spelling of 106508021 in words is "one hundred six million, five hundred eight thousand, twenty-one".