211021121113221 has 8 divisors (see below), whose sum is σ = 281361566054880. Its totient is φ = 140680711790192.

The previous prime is 211021121113217. The next prime is 211021121113291. The reversal of 211021121113221 is 122311121120112.

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 211021121113221 - 2² = 211021121113217 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (211021121113291) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11789371 + ... + 23686103.

It is an arithmetic number, because the mean of its divisors is an integer number (35170195756860).

Almost surely, 2^{211021121113221} is an apocalyptic number.

It is an amenable number.

211021121113221 is a deficient number, since it is larger than the sum of its proper divisors (70340444941659).

211021121113221 is a wasteful number, since it uses less digits than its factorization.

211021121113221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17809315.

The product of its (nonzero) digits is 96, while the sum is 21.

Adding to 211021121113221 its reverse (122311121120112), we get a palindrome (333332242233333).

The spelling of 211021121113221 in words is "two hundred eleven trillion, twenty-one billion, one hundred twenty-one million, one hundred thirteen thousand, two hundred twenty-one".