211013123 has 4 divisors (see below), whose sum is σ = 211047480. Its totient is φ = 210978768.

The previous prime is 211013119. The next prime is 211013147. The reversal of 211013123 is 321310112.

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 211013123 - 2² = 211013119 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 211013098 and 211013107.

It is not an unprimeable number, because it can be changed into a prime (211013423) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5165 + ... + 21182.

It is an arithmetic number, because the mean of its divisors is an integer number (52761870).

Almost surely, 2^211013123 is an apocalyptic number.

211013123 is a deficient number, since it is larger than the sum of its proper divisors (34357).

211013123 is an equidigital number, since it uses as much as digits as its factorization.

211013123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34356.

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

The square root of 211013123 is about 14526.2907515993. The cubic root of 211013123 is about 595.3465231915.

Adding to 211013123 its reverse (321310112), we get a palindrome (532323235).

The spelling of 211013123 in words is "two hundred eleven million, thirteen thousand, one hundred twenty-three".