10121221405 has 8 divisors (see below), whose sum is σ = 12859904952. Its totient is φ = 7620684288.

The previous prime is 10121221393. The next prime is 10121221423. The reversal of 10121221405 is 50412212101.

10121221405 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 78375609 + 10042845796 = 8853^2 + 100214^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-10121221405 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

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 in 7 ways as a sum of consecutive naturals, for example, 59536512 + ... + 59536681.

It is an arithmetic number, because the mean of its divisors is an integer number (1607488119).

Almost surely, 2^10121221405 is an apocalyptic number.

It is an amenable number.

10121221405 is a deficient number, since it is larger than the sum of its proper divisors (2738683547).

10121221405 is a wasteful number, since it uses less digits than its factorization.

10121221405 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 119073215.

The product of its (nonzero) digits is 160, while the sum is 19.

Adding to 10121221405 its reverse (50412212101), we get a palindrome (60533433506).

The spelling of 10121221405 in words is "ten billion, one hundred twenty-one million, two hundred twenty-one thousand, four hundred five".