210123013 has 4 divisors (see below), whose sum is σ = 213684480. Its totient is φ = 206561548.

The previous prime is 210123007. The next prime is 210123019. The reversal of 210123013 is 310321012.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is an interprime number because it is at equal distance from previous prime (210123007) and next prime (210123019).

It is a cyclic number.

It is not a de Polignac number, because 210123013 - 2¹⁷ = 209991941 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 210122984 and 210123002.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (210123019) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1780645 + ... + 1780762.

It is an arithmetic number, because the mean of its divisors is an integer number (53421120).

Almost surely, 2^210123013 is an apocalyptic number.

It is an amenable number.

210123013 is a deficient number, since it is larger than the sum of its proper divisors (3561467).

210123013 is an equidigital number, since it uses as much as digits as its factorization.

210123013 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3561466.

The product of its (nonzero) digits is 36, while the sum is 13.

The square root of 210123013 is about 14495.6204765439. The cubic root of 210123013 is about 594.5082328872.

Adding to 210123013 its reverse (310321012), we get a palindrome (520444025).

It can be divided in two parts, 21012 and 3013, that added together give a square (24025 = 155²).

The spelling of 210123013 in words is "two hundred ten million, one hundred twenty-three thousand, thirteen".