212111020110221 has 16 divisors (see below), whose sum is σ = 232378124616000. Its totient is φ = 192712169841408.

The previous prime is 212111020110217. The next prime is 212111020110239. The reversal of 212111020110221 is 122011020111212.

It is a cyclic number.

It is not a de Polignac number, because 212111020110221 - 2² = 212111020110217 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (17).

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 212111020110221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (212111020113221) 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, 39675395 + ... + 44703008.

It is an arithmetic number, because the mean of its divisors is an integer number (14523632788500).

Almost surely, 2^{212111020110221} is an apocalyptic number.

It is an amenable number.

212111020110221 is a deficient number, since it is larger than the sum of its proper divisors (20267104505779).

212111020110221 is a wasteful number, since it uses less digits than its factorization.

212111020110221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 84383548.

The product of its (nonzero) digits is 32, while the sum is 17.

Adding to 212111020110221 its reverse (122011020111212), we get a palindrome (334122040221433).

Subtracting from 212111020110221 its reverse (122011020111212), we obtain a palindrome (90099999999009).

The spelling of 212111020110221 in words is "two hundred twelve trillion, one hundred eleven billion, twenty million, one hundred ten thousand, two hundred twenty-one".