230121212101021 has 16 divisors (see below), whose sum is σ = 242279978436160. Its totient is φ = 217967162544000.

The previous prime is 230121212101013. The next prime is 230121212101087. The reversal of 230121212101021 is 120101212121032.

It is a cyclic number.

It is not a de Polignac number, because 230121212101021 - 2³ = 230121212101013 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 a self number, because there is not a number n which added to its sum of digits gives 230121212101021.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (230121212101621) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2289690271 + ... + 2289790771.

It is an arithmetic number, because the mean of its divisors is an integer number (15142498652260).

Almost surely, 2^{230121212101021} is an apocalyptic number.

It is an amenable number.

230121212101021 is a deficient number, since it is larger than the sum of its proper divisors (12158766335139).

230121212101021 is a wasteful number, since it uses less digits than its factorization.

230121212101021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 122764.

The product of its (nonzero) digits is 96, while the sum is 19.

Adding to 230121212101021 its reverse (120101212121032), we get a palindrome (350222424222053).

The spelling of 230121212101021 in words is "two hundred thirty trillion, one hundred twenty-one billion, two hundred twelve million, one hundred one thousand, twenty-one".