211112021023 has 4 divisors (see below), whose sum is σ = 211114514160. Its totient is φ = 211109527888.

The previous prime is 211112020997. The next prime is 211112021047. The reversal of 211112021023 is 320120211112.

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

It is a cyclic number.

It is not a de Polignac number, because 211112021023 - 2¹⁷ = 211111889951 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 211112020988 and 211112021006.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (211112021123) 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, 1114918 + ... + 1290451.

It is an arithmetic number, because the mean of its divisors is an integer number (52778628540).

Almost surely, 2^211112021023 is an apocalyptic number.

211112021023 is a deficient number, since it is larger than the sum of its proper divisors (2493137).

211112021023 is an equidigital number, since it uses as much as digits as its factorization.

211112021023 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2493136.

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

Adding to 211112021023 its reverse (320120211112), we get a palindrome (531232232135).

The spelling of 211112021023 in words is "two hundred eleven billion, one hundred twelve million, twenty-one thousand, twenty-three".