20553123212001 has 24 divisors (see below), whose sum is σ = 29771574740544. Its totient is φ = 13663480554720.

The previous prime is 20553123211987. The next prime is 20553123212047. The reversal of 20553123212001 is 10021232135502.

20553123212001 is a `hidden beast` number, since 2 + 0 + 5 + 5 + 312 + 321 + 20 + 0 + 1 = 666.

It is not a de Polignac number, because 20553123212001 - 2¹¹ = 20553123209953 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (20553123212101) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 3934671 + ... + 7522491.

It is an arithmetic number, because the mean of its divisors is an integer number (1240482280856).

Almost surely, 2^{20553123212001} is an apocalyptic number.

It is an amenable number.

20553123212001 is a deficient number, since it is larger than the sum of its proper divisors (9218451528543).

20553123212001 is a wasteful number, since it uses less digits than its factorization.

20553123212001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3589621 (or 3589618 counting only the distinct ones).

The product of its (nonzero) digits is 3600, while the sum is 27.

Adding to 20553123212001 its reverse (10021232135502), we get a palindrome (30574355347503).

The spelling of 20553123212001 in words is "twenty trillion, five hundred fifty-three billion, one hundred twenty-three million, two hundred twelve thousand, one".