212011001211001 has 4 divisors (see below), whose sum is σ = 224482236576372. Its totient is φ = 199539765845632.

The previous prime is 212011001210903. The next prime is 212011001211029. The reversal of 212011001211001 is 100112100110212.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 180515884784400 + 31495116426601 = 13435620^2 + 5612051^2 .

It is a cyclic number.

It is not a de Polignac number, because 212011001211001 - 2¹⁵ = 212011001178233 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (212011001211101) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6235617682660 + ... + 6235617682693.

It is an arithmetic number, because the mean of its divisors is an integer number (56120559144093).

Almost surely, 2^{212011001211001} is an apocalyptic number.

It is an amenable number.

212011001211001 is a deficient number, since it is larger than the sum of its proper divisors (12471235365371).

212011001211001 is a wasteful number, since it uses less digits than its factorization.

212011001211001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12471235365370.

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

Adding to 212011001211001 its reverse (100112100110212), we get a palindrome (312123101321213).

The spelling of 212011001211001 in words is "two hundred twelve trillion, eleven billion, one million, two hundred eleven thousand, one".