1212211100211 has 16 divisors (see below), whose sum is σ = 1632409190400. Its totient is φ = 800103443328.

The previous prime is 1212211100197. The next prime is 1212211100227. The reversal of 1212211100211 is 1120011122121.

It is a happy number.

It is not a de Polignac number, because 1212211100211 - 2¹³ = 1212211092019 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1212211100291) 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, 3138646 + ... + 3503643.

It is an arithmetic number, because the mean of its divisors is an integer number (102025574400).

Almost surely, 2^{1212211100211} is an apocalyptic number.

1212211100211 is a deficient number, since it is larger than the sum of its proper divisors (420198090189).

1212211100211 is a wasteful number, since it uses less digits than its factorization.

1212211100211 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6642898.

The product of its (nonzero) digits is 16, while the sum is 15.

Adding to 1212211100211 its reverse (1120011122121), we get a palindrome (2332222222332).

The spelling of 1212211100211 in words is "one trillion, two hundred twelve billion, two hundred eleven million, one hundred thousand, two hundred eleven".