20201221323212 has 12 divisors (see below), whose sum is σ = 35410378073280. Its totient is φ = 10083970445136.

The previous prime is 20201221323193. The next prime is 20201221323259. The reversal of 20201221323212 is 21232312210202.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4160051387 + ... + 4160056242.

It is an arithmetic number, because the mean of its divisors is an integer number (2950864839440).

Almost surely, 2^{20201221323212} is an apocalyptic number.

It is an amenable number.

20201221323212 is a deficient number, since it is larger than the sum of its proper divisors (15209156750068).

20201221323212 is a wasteful number, since it uses less digits than its factorization.

20201221323212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8320108240 (or 8320108238 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 23.

Adding to 20201221323212 its reverse (21232312210202), we get a palindrome (41433533533414).

The spelling of 20201221323212 in words is "twenty trillion, two hundred one billion, two hundred twenty-one million, three hundred twenty-three thousand, two hundred twelve".