210030232123 has 4 divisors (see below), whose sum is σ = 210049187040. Its totient is φ = 210011277208.

The previous prime is 210030232109. The next prime is 210030232151. The reversal of 210030232123 is 321232030012.

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 210030232123 - 2²¹ = 210028134971 is a prime.

It is a super-2 number, since 2×210030232123² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 210030232123.

It is not an unprimeable number, because it can be changed into a prime (210030233123) 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, 9460828 + ... + 9483001.

It is an arithmetic number, because the mean of its divisors is an integer number (52512296760).

Almost surely, 2^210030232123 is an apocalyptic number.

210030232123 is a deficient number, since it is larger than the sum of its proper divisors (18954917).

210030232123 is a wasteful number, since it uses less digits than its factorization.

210030232123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18954916.

The product of its (nonzero) digits is 432, while the sum is 19.

Adding to 210030232123 its reverse (321232030012), we get a palindrome (531262262135).

The spelling of 210030232123 in words is "two hundred ten billion, thirty million, two hundred thirty-two thousand, one hundred twenty-three".