1212120121211 has 8 divisors (see below), whose sum is σ = 1280596461120. Its totient is φ = 1145422387648.

The previous prime is 1212120121181. The next prime is 1212120121213. The reversal of 1212120121211 is 1121210212121.

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

It is not a de Polignac number, because 1212120121211 - 2¹⁴ = 1212120104827 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 1212120121211.

It is not an unprimeable number, because it can be changed into a prime (1212120121213) 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, 444650186 + ... + 444652911.

It is an arithmetic number, because the mean of its divisors is an integer number (160074557640).

Almost surely, 2^{1212120121211} is an apocalyptic number.

1212120121211 is a deficient number, since it is larger than the sum of its proper divisors (68476339909).

1212120121211 is an equidigital number, since it uses as much as digits as its factorization.

1212120121211 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 889303173.

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

Adding to 1212120121211 its reverse (1121210212121), we get a palindrome (2333330333332).

It can be divided in two parts, 1212120 and 121211, that added together give a palindrome (1333331).

The spelling of 1212120121211 in words is "one trillion, two hundred twelve billion, one hundred twenty million, one hundred twenty-one thousand, two hundred eleven".