211012021211221 has 8 divisors (see below), whose sum is σ = 211886107602624. Its totient is φ = 210138199908000.

The previous prime is 211012021211209. The next prime is 211012021211291. The reversal of 211012021211221 is 122112120210112.

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 not a de Polignac number, because 211012021211221 - 2¹⁹ = 211012020686933 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (211012021211291) 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, 64676656 + ... + 67860841.

It is an arithmetic number, because the mean of its divisors is an integer number (26485763450328).

Almost surely, 2^{211012021211221} is an apocalyptic number.

It is an amenable number.

211012021211221 is a deficient number, since it is larger than the sum of its proper divisors (874086391403).

211012021211221 is a wasteful number, since it uses less digits than its factorization.

211012021211221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 132544091.

The product of its (nonzero) digits is 64, while the sum is 19.

Adding to 211012021211221 its reverse (122112120210112), we get a palindrome (333124141421333).

The spelling of 211012021211221 in words is "two hundred eleven trillion, twelve billion, twenty-one million, two hundred eleven thousand, two hundred twenty-one".