12121222011211 has 8 divisors (see below), whose sum is σ = 12836912860944. Its totient is φ = 11405828693760.

The previous prime is 12121222011193. The next prime is 12121222011307. The reversal of 12121222011211 is 11211022212121.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 12121222011211 - 2⁵ = 12121222011179 is a prime.

It is not an unprimeable number, because it can be changed into a prime (12121222011911) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 74299185 + ... + 74462146.

It is an arithmetic number, because the mean of its divisors is an integer number (1604614107618).

Almost surely, 2^{12121222011211} is an apocalyptic number.

12121222011211 is a deficient number, since it is larger than the sum of its proper divisors (715690849733).

12121222011211 is a wasteful number, since it uses less digits than its factorization.

12121222011211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 148766141.

The product of its (nonzero) digits is 64, while the sum is 19.

Adding to 12121222011211 its reverse (11211022212121), we get a palindrome (23332244223332).

The spelling of 12121222011211 in words is "twelve trillion, one hundred twenty-one billion, two hundred twenty-two million, eleven thousand, two hundred eleven".