20001023213111 has 8 divisors (see below), whose sum is σ = 21080945023920. Its totient is φ = 18923825040192.

The previous prime is 20001023213081. The next prime is 20001023213159. The reversal of 20001023213111 is 11131232010002.

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

It is a cyclic number.

It is not a de Polignac number, because 20001023213111 - 2⁶ = 20001023213047 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 20001023213111.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20001023213411) 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 7 ways as a sum of consecutive naturals, for example, 680894390 + ... + 680923763.

It is an arithmetic number, because the mean of its divisors is an integer number (2635118127990).

Almost surely, 2^{20001023213111} is an apocalyptic number.

20001023213111 is a deficient number, since it is larger than the sum of its proper divisors (1079921810809).

20001023213111 is a wasteful number, since it uses less digits than its factorization.

20001023213111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1361818945.

The product of its (nonzero) digits is 72, while the sum is 17.

Adding to 20001023213111 its reverse (11131232010002), we get a palindrome (31132255223113).

The spelling of 20001023213111 in words is "twenty trillion, one billion, twenty-three million, two hundred thirteen thousand, one hundred eleven".