20121055001345 has 8 divisors (see below), whose sum is σ = 24977861381160. Its totient is φ = 15541780414720.

The previous prime is 20121055001233. The next prime is 20121055001381. The reversal of 20121055001345 is 54310055012102.

It can be written as a sum of positive squares in 4 ways, for example, as 14807969344 + 20106247032001 = 121688^2 + 4483999^2 .

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

It is not a de Polignac number, because 20121055001345 - 2¹² = 20121054997249 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (29).

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, 69382948136 + ... + 69382948425.

It is an arithmetic number, because the mean of its divisors is an integer number (3122232672645).

Almost surely, 2^{20121055001345} is an apocalyptic number.

It is an amenable number.

20121055001345 is a deficient number, since it is larger than the sum of its proper divisors (4856806379815).

20121055001345 is a wasteful number, since it uses less digits than its factorization.

20121055001345 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 138765896595.

The product of its (nonzero) digits is 6000, while the sum is 29.

The spelling of 20121055001345 in words is "twenty trillion, one hundred twenty-one billion, fifty-five million, one thousand, three hundred forty-five".