106066515721 has 2 divisors, whose sum is σ = 106066515722. Its totient is φ = 106066515720.

The previous prime is 106066515713. The next prime is 106066515761. The reversal of 106066515721 is 127515660601.

It is an a-pointer prime, because the next prime (106066515761) can be obtained adding 106066515721 to its sum of digits (40).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 80462995600 + 25603520121 = 283660^2 + 160011^2 .

It is a cyclic number.

It is not a de Polignac number, because 106066515721 - 2³ = 106066515713 is a prime.

It is a super-2 number, since 2×106066515721² (a number of 23 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (106066515761) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 53033257860 + 53033257861.

It is an arithmetic number, because the mean of its divisors is an integer number (53033257861).

Almost surely, 2^106066515721 is an apocalyptic number.

It is an amenable number.

106066515721 is a deficient number, since it is larger than the sum of its proper divisors (1).

106066515721 is an equidigital number, since it uses as much as digits as its factorization.

106066515721 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 75600, while the sum is 40.

The spelling of 106066515721 in words is "one hundred six billion, sixty-six million, five hundred fifteen thousand, seven hundred twenty-one".