211221120323212 has 12 divisors (see below), whose sum is σ = 378233168951176. Its totient is φ = 103154500622880.

The previous prime is 211221120323209. The next prime is 211221120323221. The reversal of 211221120323212 is 212323021122112.

It is a super-2 number, since 2×211221120323212² (a number of 29 digits) contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 614014884489 + ... + 614014884832.

Almost surely, 2^{211221120323212} is an apocalyptic number.

It is an amenable number.

211221120323212 is a deficient number, since it is larger than the sum of its proper divisors (167012048627964).

211221120323212 is a wasteful number, since it uses less digits than its factorization.

211221120323212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1228029769368 (or 1228029769366 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 25.

Adding to 211221120323212 its reverse (212323021122112), we get a palindrome (423544141445324).

The spelling of 211221120323212 in words is "two hundred eleven trillion, two hundred twenty-one billion, one hundred twenty million, three hundred twenty-three thousand, two hundred twelve".