12121222112211 has 16 divisors (see below), whose sum is σ = 16542254592000. Its totient is φ = 7891268034048.

The previous prime is 12121222112113. The next prime is 12121222112227. The reversal of 12121222112211 is 11221122212121.

It is not a de Polignac number, because 12121222112211 - 2³³ = 12112632177619 is a prime.

It is not an unprimeable number, because it can be changed into a prime (12121222112011) 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, 95667331 + ... + 95793948.

It is an arithmetic number, because the mean of its divisors is an integer number (1033890912000).

Almost surely, 2^{12121222112211} is an apocalyptic number.

12121222112211 is a deficient number, since it is larger than the sum of its proper divisors (4421032479789).

12121222112211 is a wasteful number, since it uses less digits than its factorization.

12121222112211 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 191461778.

The product of its digits is 128, while the sum is 21.

Adding to 12121222112211 its reverse (11221122212121), we get a palindrome (23342344324332).

The spelling of 12121222112211 in words is "twelve trillion, one hundred twenty-one billion, two hundred twenty-two million, one hundred twelve thousand, two hundred eleven".