213111023 has 8 divisors (see below), whose sum is σ = 215487360. Its totient is φ = 210742560.

The previous prime is 213111013. The next prime is 213111043. The reversal of 213111023 is 320111312.

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 213111023 - 2⁴ = 213111007 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 213110989 and 213111007.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (213111013) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 64553 + ... + 67773.

It is an arithmetic number, because the mean of its divisors is an integer number (26935920).

Almost surely, 2^213111023 is an apocalyptic number.

213111023 is a deficient number, since it is larger than the sum of its proper divisors (2376337).

213111023 is a wasteful number, since it uses less digits than its factorization.

213111023 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3937.

The product of its (nonzero) digits is 36, while the sum is 14.

The square root of 213111023 is about 14598.3226091219. The cubic root of 213111023 is about 597.3130060315.

Adding to 213111023 its reverse (320111312), we get a palindrome (533222335).

The spelling of 213111023 in words is "two hundred thirteen million, one hundred eleven thousand, twenty-three".