210021211000111 has 16 divisors (see below), whose sum is σ = 241457402419200. Its totient is φ = 178943704194528.

The previous prime is 210021211000091. The next prime is 210021211000177. The reversal of 210021211000111 is 111000112120012.

It is a happy number.

It is not a de Polignac number, because 210021211000111 - 2⁴¹ = 207822187744559 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 210021211000091 and 210021211000100.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (210021211010111) 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 15 ways as a sum of consecutive naturals, for example, 10033341 + ... + 22819078.

It is an arithmetic number, because the mean of its divisors is an integer number (15091087651200).

Almost surely, 2^{210021211000111} is an apocalyptic number.

210021211000111 is a deficient number, since it is larger than the sum of its proper divisors (31436191419089).

210021211000111 is a wasteful number, since it uses less digits than its factorization.

210021211000111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32857878.

The product of its (nonzero) digits is 8, while the sum is 13.

Adding to 210021211000111 its reverse (111000112120012), we get a palindrome (321021323120123).

The spelling of 210021211000111 in words is "two hundred ten trillion, twenty-one billion, two hundred eleven million, one hundred eleven", and thus it is an aban number.