1212111011211 has 8 divisors (see below), whose sum is σ = 1616153203200. Its totient is φ = 808071413352.

The previous prime is 1212111011149. The next prime is 1212111011213. The reversal of 1212111011211 is 1121101112121.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1212111011211 - 2²¹ = 1212108914059 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1212111011213) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1170990 + ... + 1948188.

It is an arithmetic number, because the mean of its divisors is an integer number (202019150400).

Almost surely, 2^{1212111011211} is an apocalyptic number.

1212111011211 is a deficient number, since it is larger than the sum of its proper divisors (404042191989).

1212111011211 is an equidigital number, since it uses as much as digits as its factorization.

1212111011211 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1297065.

The product of its (nonzero) digits is 8, while the sum is 15.

Adding to 1212111011211 its reverse (1121101112121), we get a palindrome (2333212123332).

The spelling of 1212111011211 in words is "one trillion, two hundred twelve billion, one hundred eleven million, eleven thousand, two hundred eleven".