1212212011211 has 16 divisors (see below), whose sum is σ = 1285041542400. Its totient is φ = 1140308574048.

The previous prime is 1212212011093. The next prime is 1212212011217. The reversal of 1212212011211 is 1121102122121.

It is a cyclic number.

It is not a de Polignac number, because 1212212011211 - 2²⁶ = 1212144902347 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1212212011211.

It is not an unprimeable number, because it can be changed into a prime (1212212011217) 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, 1560800 + ... + 2204658.

It is an arithmetic number, because the mean of its divisors is an integer number (80315096400).

Almost surely, 2^{1212212011211} is an apocalyptic number.

1212212011211 is a deficient number, since it is larger than the sum of its proper divisors (72829531189).

1212212011211 is a wasteful number, since it uses less digits than its factorization.

1212212011211 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 644578.

The product of its (nonzero) digits is 32, while the sum is 17.

Adding to 1212212011211 its reverse (1121102122121), we get a palindrome (2333314133332).

The spelling of 1212212011211 in words is "one trillion, two hundred twelve billion, two hundred twelve million, eleven thousand, two hundred eleven".