212102021221211 has 6 divisors (see below), whose sum is σ = 233136932416836. Its totient is φ = 192820019291900.

The previous prime is 212102021221201. The next prime is 212102021221249. The reversal of 212102021221211 is 112122120201212.

It is a de Polignac number, because none of the positive numbers 2^k-212102021221211 is a prime.

It is a super-2 number, since 2×212102021221211² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (212102021221201) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 876454633025 + ... + 876454633266.

It is an arithmetic number, because the mean of its divisors is an integer number (38856155402806).

Almost surely, 2^{212102021221211} is an apocalyptic number.

212102021221211 is a deficient number, since it is larger than the sum of its proper divisors (21034911195625).

212102021221211 is a wasteful number, since it uses less digits than its factorization.

212102021221211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1752909266313 (or 1752909266302 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 20.

Adding to 212102021221211 its reverse (112122120201212), we get a palindrome (324224141422423).

The spelling of 212102021221211 in words is "two hundred twelve trillion, one hundred two billion, twenty-one million, two hundred twenty-one thousand, two hundred eleven".