211011023 has 4 divisors (see below), whose sum is σ = 211302000. Its totient is φ = 210720048.

The previous prime is 211011011. The next prime is 211011071. The reversal of 211011023 is 320110112.

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 211011023 - 2⁴ = 211011007 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 211010995 and 211011013.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (211011083) 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, 144398 + ... + 145851.

It is an arithmetic number, because the mean of its divisors is an integer number (52825500).

Almost surely, 2^211011023 is an apocalyptic number.

211011023 is a deficient number, since it is larger than the sum of its proper divisors (290977).

211011023 is an equidigital number, since it uses as much as digits as its factorization.

211011023 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 290976.

The product of its (nonzero) digits is 12, while the sum is 11.

The square root of 211011023 is about 14526.2184686862. The cubic root of 211011023 is about 595.3445482245.

Adding to 211011023 its reverse (320110112), we get a palindrome (531121135).

The spelling of 211011023 in words is "two hundred eleven million, eleven thousand, twenty-three".