212121123230 has 16 divisors (see below), whose sum is σ = 381823835904. Its totient is φ = 84847157280.

The previous prime is 212121123209. The next prime is 212121123233. The reversal of 212121123230 is 32321121212.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (212121123233) 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, 801464 + ... + 1032756.

It is an arithmetic number, because the mean of its divisors is an integer number (23863989744).

Almost surely, 2^212121123230 is an apocalyptic number.

212121123230 is a deficient number, since it is larger than the sum of its proper divisors (169702712674).

212121123230 is a wasteful number, since it uses less digits than its factorization.

212121123230 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 323011.

The product of its (nonzero) digits is 288, while the sum is 20.

Adding to 212121123230 its reverse (32321121212), we get a palindrome (244442244442).

The spelling of 212121123230 in words is "two hundred twelve billion, one hundred twenty-one million, one hundred twenty-three thousand, two hundred thirty".