201212100202221 has 12 divisors (see below), whose sum is σ = 305936526623520. Its totient is φ = 127081326443400.

The previous prime is 201212100202109. The next prime is 201212100202291. The reversal of 201212100202221 is 122202001212102.

It is a happy number.

201212100202221 is a `hidden beast` number, since 20 + 1 + 212 + 10 + 0 + 202 + 221 = 666.

It is not a de Polignac number, because 201212100202221 - 2²² = 201212096007917 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 201212100202194 and 201212100202203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (201212100202291) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 588339474105 + ... + 588339474446.

It is an arithmetic number, because the mean of its divisors is an integer number (25494710551960).

Almost surely, 2^{201212100202221} is an apocalyptic number.

It is an amenable number.

201212100202221 is a deficient number, since it is larger than the sum of its proper divisors (104724426421299).

201212100202221 is a wasteful number, since it uses less digits than its factorization.

201212100202221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1176678948576 (or 1176678948573 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 18.

Adding to 201212100202221 its reverse (122202001212102), we get a palindrome (323414101414323).

The spelling of 201212100202221 in words is "two hundred one trillion, two hundred twelve billion, one hundred million, two hundred two thousand, two hundred twenty-one".