20121073005 has 32 divisors (see below), whose sum is σ = 35127324288. Its totient is φ = 9753753600.

The previous prime is 20121072997. The next prime is 20121073043. The reversal of 20121073005 is 50037012102.

It is not a de Polignac number, because 20121073005 - 2³ = 20121072997 is a prime.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1199637 + ... + 1216293.

It is an arithmetic number, because the mean of its divisors is an integer number (1097728884).

Almost surely, 2^20121073005 is an apocalyptic number.

It is an amenable number.

20121073005 is a deficient number, since it is larger than the sum of its proper divisors (15006251283).

20121073005 is a wasteful number, since it uses less digits than its factorization.

20121073005 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23997.

The product of its (nonzero) digits is 420, while the sum is 21.

Adding to 20121073005 its reverse (50037012102), we get a palindrome (70158085107).

The spelling of 20121073005 in words is "twenty billion, one hundred twenty-one million, seventy-three thousand, five".