21212112021230 has 32 divisors (see below), whose sum is σ = 41120132717664. Its totient is φ = 7831922645376.

The previous prime is 21212112021091. The next prime is 21212112021251. The reversal of 21212112021230 is 3212021121212.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1736012 + ... + 6740768.

It is an arithmetic number, because the mean of its divisors is an integer number (1285004147427).

Almost surely, 2^{21212112021230} is an apocalyptic number.

21212112021230 is a deficient number, since it is larger than the sum of its proper divisors (19908020696434).

21212112021230 is a wasteful number, since it uses less digits than its factorization.

21212112021230 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5037380.

The product of its (nonzero) digits is 192, while the sum is 20.

Adding to 21212112021230 its reverse (3212021121212), we get a palindrome (24424133142442).

The spelling of 21212112021230 in words is "twenty-one trillion, two hundred twelve billion, one hundred twelve million, twenty-one thousand, two hundred thirty".