201011212221 has 8 divisors (see below), whose sum is σ = 268019007360. Its totient is φ = 134005445952.

The previous prime is 201011212217. The next prime is 201011212271. The reversal of 201011212221 is 122212110102.

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

It is not a de Polignac number, because 201011212221 - 2² = 201011212217 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 201011212221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (201011212271) 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, 258636 + ... + 684773.

It is an arithmetic number, because the mean of its divisors is an integer number (33502375920).

Almost surely, 2^201011212221 is an apocalyptic number.

It is an amenable number.

201011212221 is a deficient number, since it is larger than the sum of its proper divisors (67007795139).

201011212221 is an equidigital number, since it uses as much as digits as its factorization.

201011212221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1014435.

The product of its (nonzero) digits is 32, while the sum is 15.

Adding to 201011212221 its reverse (122212110102), we get a palindrome (323223322323).

The spelling of 201011212221 in words is "two hundred one billion, eleven million, two hundred twelve thousand, two hundred twenty-one".