211222201221021 has 8 divisors (see below), whose sum is σ = 281631547283904. Its totient is φ = 140813827986080.

The previous prime is 211222201221011. The next prime is 211222201221041. The reversal of 211222201221021 is 120122102222112.

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

It is a cyclic number.

It is not a de Polignac number, because 211222201221021 - 2²¹ = 211222199123869 is a prime.

It is a super-2 number, since 2×211222201221021² (a number of 29 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (211222201221011) 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, 242700216 + ... + 243568961.

It is an arithmetic number, because the mean of its divisors is an integer number (35203943410488).

Almost surely, 2^{211222201221021} is an apocalyptic number.

It is an amenable number.

211222201221021 is a deficient number, since it is larger than the sum of its proper divisors (70409346062883).

211222201221021 is a wasteful number, since it uses less digits than its factorization.

211222201221021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 486413971.

The product of its (nonzero) digits is 256, while the sum is 21.

Adding to 211222201221021 its reverse (120122102222112), we get a palindrome (331344303443133).

The spelling of 211222201221021 in words is "two hundred eleven trillion, two hundred twenty-two billion, two hundred one million, two hundred twenty-one thousand, twenty-one".