20121801101607 has 4 divisors (see below), whose sum is σ = 26829068135480. Its totient is φ = 13414534067736.

The previous prime is 20121801101593. The next prime is 20121801101651. The reversal of 20121801101607 is 70610110812102.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 20121801101607 - 2¹¹ = 20121801099559 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20121801100607) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3353633516932 + ... + 3353633516937.

It is an arithmetic number, because the mean of its divisors is an integer number (6707267033870).

Almost surely, 2^{20121801101607} is an apocalyptic number.

20121801101607 is a deficient number, since it is larger than the sum of its proper divisors (6707267033873).

20121801101607 is an equidigital number, since it uses as much as digits as its factorization.

20121801101607 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6707267033872.

The product of its (nonzero) digits is 1344, while the sum is 30.

Adding to 20121801101607 its reverse (70610110812102), we get a palindrome (90731911913709).

The spelling of 20121801101607 in words is "twenty trillion, one hundred twenty-one billion, eight hundred one million, one hundred one thousand, six hundred seven".