10621896643109 has 2 divisors, whose sum is σ = 10621896643110. Its totient is φ = 10621896643108.

The previous prime is 10621896643021. The next prime is 10621896643121. The reversal of 10621896643109 is 90134669812601.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 6112020062500 + 4509876580609 = 2472250^2 + 2123647^2 .

It is a cyclic number.

It is not a de Polignac number, because 10621896643109 - 2⁸ = 10621896642853 is a prime.

It is a super-2 number, since 2×10621896643109² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (10621896642109) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5310948321554 + 5310948321555.

It is an arithmetic number, because the mean of its divisors is an integer number (5310948321555).

Almost surely, 2^{10621896643109} is an apocalyptic number.

It is an amenable number.

10621896643109 is a deficient number, since it is larger than the sum of its proper divisors (1).

10621896643109 is an equidigital number, since it uses as much as digits as its factorization.

10621896643109 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3359232, while the sum is 56.

The spelling of 10621896643109 in words is "ten trillion, six hundred twenty-one billion, eight hundred ninety-six million, six hundred forty-three thousand, one hundred nine".