20121235055 has 8 divisors (see below), whose sum is σ = 24223122144. Its totient is φ = 16045228000.

The previous prime is 20121235027. The next prime is 20121235103. The reversal of 20121235055 is 55053212102.

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

It is not a de Polignac number, because 20121235055 - 2¹⁰ = 20121234031 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6468296 + ... + 6471405.

It is an arithmetic number, because the mean of its divisors is an integer number (3027890268).

Almost surely, 2^20121235055 is an apocalyptic number.

20121235055 is a deficient number, since it is larger than the sum of its proper divisors (4101887089).

20121235055 is a wasteful number, since it uses less digits than its factorization.

20121235055 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12940017.

The product of its (nonzero) digits is 3000, while the sum is 26.

Adding to 20121235055 its reverse (55053212102), we get a palindrome (75174447157).

The spelling of 20121235055 in words is "twenty billion, one hundred twenty-one million, two hundred thirty-five thousand, fifty-five".