1212121210211 has 16 divisors (see below), whose sum is σ = 1280618707200. Its totient is φ = 1144095111648.

The previous prime is 1212121210207. The next prime is 1212121210217. The reversal of 1212121210211 is 1120121212121.

It is not a de Polignac number, because 1212121210211 - 2² = 1212121210207 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 1212121210211.

It is not an unprimeable number, because it can be changed into a prime (1212121210217) 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, 48536450 + ... + 48561416.

It is an arithmetic number, because the mean of its divisors is an integer number (80038669200).

Almost surely, 2^{1212121210211} is an apocalyptic number.

1212121210211 is a deficient number, since it is larger than the sum of its proper divisors (68497496989).

1212121210211 is a wasteful number, since it uses less digits than its factorization.

1212121210211 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34298.

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

Adding to 1212121210211 its reverse (1120121212121), we get a palindrome (2332242422332).

The spelling of 1212121210211 in words is "one trillion, two hundred twelve billion, one hundred twenty-one million, two hundred ten thousand, two hundred eleven".