210011121220111 has 16 divisors (see below), whose sum is σ = 210649112593920. Its totient is φ = 209373870988800.

The previous prime is 210011121220093. The next prime is 210011121220133. The reversal of 210011121220111 is 111022121110012.

It is a cyclic number.

It is not a de Polignac number, because 210011121220111 - 2¹⁷ = 210011121089039 is a prime.

It is a super-2 number, since 2×210011121220111² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (210011121220151) 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 15 ways as a sum of consecutive naturals, for example, 6771697041 + ... + 6771728053.

It is an arithmetic number, because the mean of its divisors is an integer number (13165569537120).

Almost surely, 2^{210011121220111} is an apocalyptic number.

210011121220111 is a deficient number, since it is larger than the sum of its proper divisors (637991373809).

210011121220111 is a wasteful number, since it uses less digits than its factorization.

210011121220111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42306.

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

Adding to 210011121220111 its reverse (111022121110012), we get a palindrome (321033242330123).

The spelling of 210011121220111 in words is "two hundred ten trillion, eleven billion, one hundred twenty-one million, two hundred twenty thousand, one hundred eleven".