12121021222011 has 96 divisors (see below), whose sum is σ = 20491955527680. Its totient is φ = 6837074438400.

The previous prime is 12121021221929. The next prime is 12121021222027. The reversal of 12121021222011 is 11022212012121.

12121021222011 is a `hidden beast` number, since 1 + 21 + 210 + 212 + 220 + 1 + 1 = 666.

It is not a de Polignac number, because 12121021222011 - 2²¹ = 12121019124859 is a prime.

It is not an unprimeable number, because it can be changed into a prime (12121021222061) 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 95 ways as a sum of consecutive naturals, for example, 370804510 + ... + 370837196.

It is an arithmetic number, because the mean of its divisors is an integer number (213457870080).

Almost surely, 2^{12121021222011} is an apocalyptic number.

12121021222011 is a deficient number, since it is larger than the sum of its proper divisors (8370934305669).

12121021222011 is a wasteful number, since it uses less digits than its factorization.

12121021222011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38137 (or 38134 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 18.

Adding to 12121021222011 its reverse (11022212012121), we get a palindrome (23143233234132).

The spelling of 12121021222011 in words is "twelve trillion, one hundred twenty-one billion, twenty-one million, two hundred twenty-two thousand, eleven".