210011221021111 has 8 divisors (see below), whose sum is σ = 216603104727744. Its totient is φ = 203507818975200.

The previous prime is 210011221021087. The next prime is 210011221021177. The reversal of 210011221021111 is 111120122110012.

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 210011221021111 - 2¹³ = 210011221012919 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 (210011221021211) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 22120410360 + ... + 22120419853.

It is an arithmetic number, because the mean of its divisors is an integer number (27075388090968).

Almost surely, 2^{210011221021111} is an apocalyptic number.

210011221021111 is a deficient number, since it is larger than the sum of its proper divisors (6591883706633).

210011221021111 is a wasteful number, since it uses less digits than its factorization.

210011221021111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 44240830361.

The product of its (nonzero) digits is 16, while the sum is 16.

Adding to 210011221021111 its reverse (111120122110012), we get a palindrome (321131343131123).

The spelling of 210011221021111 in words is "two hundred ten trillion, eleven billion, two hundred twenty-one million, twenty-one thousand, one hundred eleven".