212011211101 has 2 divisors, whose sum is σ = 212011211102. Its totient is φ = 212011211100.

The previous prime is 212011211017. The next prime is 212011211123. The reversal of 212011211101 is 101112110212.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 181412105625 + 30599105476 = 425925^2 + 174926^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-212011211101 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (212011211171) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106005605550 + 106005605551.

It is an arithmetic number, because the mean of its divisors is an integer number (106005605551).

Almost surely, 2^212011211101 is an apocalyptic number.

It is an amenable number.

212011211101 is a deficient number, since it is larger than the sum of its proper divisors (1).

212011211101 is an equidigital number, since it uses as much as digits as its factorization.

212011211101 is an odious number, because the sum of its binary digits is odd.

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

Adding to 212011211101 its reverse (101112110212), we get a palindrome (313123321313).

The spelling of 212011211101 in words is "two hundred twelve billion, eleven million, two hundred eleven thousand, one hundred one".