201221212021210 has 32 divisors (see below), whose sum is σ = 382659854434560. Its totient is φ = 76059551303232.

The previous prime is 201221212021153. The next prime is 201221212021303. The reversal of 201221212021210 is 12120212122102.

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, 7381542204 + ... + 7381569463.

It is an arithmetic number, because the mean of its divisors is an integer number (11958120451080).

Almost surely, 2^{201221212021210} is an apocalyptic number.

201221212021210 is a deficient number, since it is larger than the sum of its proper divisors (181438642413350).

201221212021210 is a wasteful number, since it uses less digits than its factorization.

201221212021210 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14763111750.

The product of its (nonzero) digits is 128, while the sum is 19.

Adding to 201221212021210 its reverse (12120212122102), we get a palindrome (213341424143312).

The spelling of 201221212021210 in words is "two hundred one trillion, two hundred twenty-one billion, two hundred twelve million, twenty-one thousand, two hundred ten".