10121221705943 has 2 divisors, whose sum is σ = 10121221705944. Its totient is φ = 10121221705942.

The previous prime is 10121221705919. The next prime is 10121221705993. The reversal of 10121221705943 is 34950712212101.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 10121221705943 - 2¹² = 10121221701847 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 10121221705897 and 10121221705906.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (10121221705993) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5060610852971 + 5060610852972.

It is an arithmetic number, because the mean of its divisors is an integer number (5060610852972).

Almost surely, 2^{10121221705943} is an apocalyptic number.

10121221705943 is a deficient number, since it is larger than the sum of its proper divisors (1).

10121221705943 is an equidigital number, since it uses as much as digits as its factorization.

10121221705943 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 30240, while the sum is 38.

The spelling of 10121221705943 in words is "ten trillion, one hundred twenty-one billion, two hundred twenty-one million, seven hundred five thousand, nine hundred forty-three".