210423120121 has 8 divisors (see below), whose sum is σ = 224301795200. Its totient is φ = 196824822480.

The previous prime is 210423120091. The next prime is 210423120181. The reversal of 210423120121 is 121021324012.

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 210423120121 - 2⁷ = 210423119993 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (19).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (210423120181) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 70092810 + ... + 70095811.

It is an arithmetic number, because the mean of its divisors is an integer number (28037724400).

Almost surely, 2^210423120121 is an apocalyptic number.

It is an amenable number.

210423120121 is a deficient number, since it is larger than the sum of its proper divisors (13878675079).

210423120121 is a wasteful number, since it uses less digits than its factorization.

210423120121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 140188719.

The product of its (nonzero) digits is 192, while the sum is 19.

Adding to 210423120121 its reverse (121021324012), we get a palindrome (331444444133).

The spelling of 210423120121 in words is "two hundred ten billion, four hundred twenty-three million, one hundred twenty thousand, one hundred twenty-one".