1212222120011 has 64 divisors (see below), whose sum is σ = 1505945952000. Its totient is φ = 973615104000.

The previous prime is 1212222119893. The next prime is 1212222120017. The reversal of 1212222120011 is 1100212222121.

It is not a de Polignac number, because 1212222120011 - 2¹⁸ = 1212221857867 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1212222120017) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 78702911 + ... + 78718311.

It is an arithmetic number, because the mean of its divisors is an integer number (23530405500).

Almost surely, 2^{1212222120011} is an apocalyptic number.

1212222120011 is a deficient number, since it is larger than the sum of its proper divisors (293723831989).

1212222120011 is a wasteful number, since it uses less digits than its factorization.

1212222120011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15685 (or 15671 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 17.

Adding to 1212222120011 its reverse (1100212222121), we get a palindrome (2312434342132).

The spelling of 1212222120011 in words is "one trillion, two hundred twelve billion, two hundred twenty-two million, one hundred twenty thousand, eleven".