210220211011111 has 16 divisors (see below), whose sum is σ = 240964458808320. Its totient is φ = 179654526548640.

The previous prime is 210220211011099. The next prime is 210220211011163. The reversal of 210220211011111 is 111110112022012.

It is a cyclic number.

It is not a de Polignac number, because 210220211011111 - 2⁴⁵ = 175035838922279 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 (210220211014111) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8359311 + ... + 22143136.

It is an arithmetic number, because the mean of its divisors is an integer number (15060278675520).

Almost surely, 2^{210220211011111} is an apocalyptic number.

210220211011111 is a deficient number, since it is larger than the sum of its proper divisors (30744247797209).

210220211011111 is a wasteful number, since it uses less digits than its factorization.

210220211011111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30505374.

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

Adding to 210220211011111 its reverse (111110112022012), we get a palindrome (321330323033123).

The spelling of 210220211011111 in words is "two hundred ten trillion, two hundred twenty billion, two hundred eleven million, eleven thousand, one hundred eleven".