210210121301123 has 4 divisors (see below), whose sum is σ = 210509993086848. Its totient is φ = 209910249515400.

The previous prime is 210210121301111. The next prime is 210210121301161. The reversal of 210210121301123 is 321103121012012.

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 210210121301123 - 2⁴ = 210210121301107 is a prime.

It is a super-2 number, since 2×210210121301123² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 210210121301095 and 210210121301104.

It is not an unprimeable number, because it can be changed into a prime (210210121303123) 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, 149935891811 + ... + 149935893212.

It is an arithmetic number, because the mean of its divisors is an integer number (52627498271712).

Almost surely, 2^{210210121301123} is an apocalyptic number.

210210121301123 is a deficient number, since it is larger than the sum of its proper divisors (299871785725).

210210121301123 is an equidigital number, since it uses as much as digits as its factorization.

210210121301123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 299871785724.

The product of its (nonzero) digits is 144, while the sum is 20.

Adding to 210210121301123 its reverse (321103121012012), we get a palindrome (531313242313135).

The spelling of 210210121301123 in words is "two hundred ten trillion, two hundred ten billion, one hundred twenty-one million, three hundred one thousand, one hundred twenty-three".