211202211221221 has 8 divisors (see below), whose sum is σ = 231030211734144. Its totient is φ = 191478843957120.

The previous prime is 211202211221173. The next prime is 211202211221263. The reversal of 211202211221221 is 122122112202112.

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 211202211221221 - 2²⁹ = 211201674350309 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 211202211221192 and 211202211221201.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (211202211221621) 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, 26158307980 + ... + 26158316053.

It is an arithmetic number, because the mean of its divisors is an integer number (28878776466768).

Almost surely, 2^{211202211221221} is an apocalyptic number.

It is an amenable number.

211202211221221 is a deficient number, since it is larger than the sum of its proper divisors (19828000512923).

211202211221221 is a wasteful number, since it uses less digits than its factorization.

211202211221221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 52316624411.

The product of its (nonzero) digits is 256, while the sum is 22.

Adding to 211202211221221 its reverse (122122112202112), we get a palindrome (333324323423333).

The spelling of 211202211221221 in words is "two hundred eleven trillion, two hundred two billion, two hundred eleven million, two hundred twenty-one thousand, two hundred twenty-one".