21621212230322 has 32 divisors (see below), whose sum is σ = 35124373414080. Its totient is φ = 9946935587520.

The previous prime is 21621212230313. The next prime is 21621212230363. The reversal of 21621212230322 is 22303221212612.

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, 13021004 + ... + 14587287.

It is an arithmetic number, because the mean of its divisors is an integer number (1097636669190).

Almost surely, 2^{21621212230322} is an apocalyptic number.

21621212230322 is a deficient number, since it is larger than the sum of its proper divisors (13503161183758).

21621212230322 is a wasteful number, since it uses less digits than its factorization.

21621212230322 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27608906.

The product of its (nonzero) digits is 6912, while the sum is 29.

Adding to 21621212230322 its reverse (22303221212612), we get a palindrome (43924433442934).

The spelling of 21621212230322 in words is "twenty-one trillion, six hundred twenty-one billion, two hundred twelve million, two hundred thirty thousand, three hundred twenty-two".