12211021211101 has 2 divisors, whose sum is σ = 12211021211102. Its totient is φ = 12211021211100.

The previous prime is 12211021211099. The next prime is 12211021211131. The reversal of 12211021211101 is 10111212011221.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 10629073571076 + 1581947640025 = 3260226^2 + 1257755^2 .

It is a cyclic number.

It is not a de Polignac number, because 12211021211101 - 2¹ = 12211021211099 is a prime.

Together with 12211021211099, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12211021211131) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6105510605550 + 6105510605551.

It is an arithmetic number, because the mean of its divisors is an integer number (6105510605551).

Almost surely, 2^{12211021211101} is an apocalyptic number.

It is an amenable number.

12211021211101 is a deficient number, since it is larger than the sum of its proper divisors (1).

12211021211101 is an equidigital number, since it uses as much as digits as its factorization.

12211021211101 is an evil number, because the sum of its binary digits is even.

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

Adding to 12211021211101 its reverse (10111212011221), we get a palindrome (22322233222322).

The spelling of 12211021211101 in words is "twelve trillion, two hundred eleven billion, twenty-one million, two hundred eleven thousand, one hundred one".