20111202110023 has 4 divisors (see below), whose sum is σ = 20157863832288. Its totient is φ = 20064540387760.

The previous prime is 20111202110017. The next prime is 20111202110033. The reversal of 20111202110023 is 32001120211102.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20111202110023 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20111202109979 and 20111202110006.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20111202110033) 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, 23330860486 + ... + 23330861347.

It is an arithmetic number, because the mean of its divisors is an integer number (5039465958072).

Almost surely, 2^{20111202110023} is an apocalyptic number.

20111202110023 is a deficient number, since it is larger than the sum of its proper divisors (46661722265).

20111202110023 is an equidigital number, since it uses as much as digits as its factorization.

20111202110023 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 46661722264.

The product of its (nonzero) digits is 48, while the sum is 16.

Adding to 20111202110023 its reverse (32001120211102), we get a palindrome (52112322321125).

The spelling of 20111202110023 in words is "twenty trillion, one hundred eleven billion, two hundred two million, one hundred ten thousand, twenty-three".