121006130605 has 16 divisors (see below), whose sum is σ = 146882550960. Its totient is φ = 95688755712.

The previous prime is 121006130593. The next prime is 121006130627. The reversal of 121006130605 is 506031600121.

It can be written as a sum of positive squares in 8 ways, for example, as 2760241444 + 118245889161 = 52538^2 + 343869^2 .

It is a cyclic number.

It is not a de Polignac number, because 121006130605 - 2⁵ = 121006130573 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 121006130605.

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 15 ways as a sum of consecutive naturals, for example, 1526407 + ... + 1603723.

It is an arithmetic number, because the mean of its divisors is an integer number (9180159435).

Almost surely, 2^121006130605 is an apocalyptic number.

It is an amenable number.

121006130605 is a deficient number, since it is larger than the sum of its proper divisors (25876420355).

121006130605 is an equidigital number, since it uses as much as digits as its factorization.

121006130605 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 80928.

The product of its (nonzero) digits is 1080, while the sum is 25.

Adding to 121006130605 its reverse (506031600121), we get a palindrome (627037730726).

The spelling of 121006130605 in words is "one hundred twenty-one billion, six million, one hundred thirty thousand, six hundred five".