201210212221 has 8 divisors (see below), whose sum is σ = 206839289664. Its totient is φ = 195658777440.

The previous prime is 201210212197. The next prime is 201210212239. The reversal of 201210212221 is 122212012102.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-201210212221 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 201210212195 and 201210212204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (201210212261) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 19405411 + ... + 19415776.

It is an arithmetic number, because the mean of its divisors is an integer number (25854911208).

Almost surely, 2^201210212221 is an apocalyptic number.

It is an amenable number.

201210212221 is a deficient number, since it is larger than the sum of its proper divisors (5629077443).

201210212221 is an equidigital number, since it uses as much as digits as its factorization.

201210212221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38821331.

The product of its (nonzero) digits is 64, while the sum is 16.

Adding to 201210212221 its reverse (122212012102), we get a palindrome (323422224323).

It can be divided in two parts, 2012102 and 12221, that multiplied together give a palindrome (24589898542).

The spelling of 201210212221 in words is "two hundred one billion, two hundred ten million, two hundred twelve thousand, two hundred twenty-one".