12121202122211 has 32 divisors (see below), whose sum is σ = 14977487078400. Its totient is φ = 9552430341504.

The previous prime is 12121202122207. The next prime is 12121202122219. The reversal of 12121202122211 is 11222120212121.

It is a cyclic number.

It is not a de Polignac number, because 12121202122211 - 2² = 12121202122207 is a prime.

It is not an unprimeable number, because it can be changed into a prime (12121202122219) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 166273976 + ... + 166346858.

It is an arithmetic number, because the mean of its divisors is an integer number (468046471200).

Almost surely, 2^{12121202122211} is an apocalyptic number.

12121202122211 is a deficient number, since it is larger than the sum of its proper divisors (2856284956189).

12121202122211 is a wasteful number, since it uses less digits than its factorization.

12121202122211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 80115.

The product of its (nonzero) digits is 128, while the sum is 20.

Adding to 12121202122211 its reverse (11222120212121), we get a palindrome (23343322334332).

The spelling of 12121202122211 in words is "twelve trillion, one hundred twenty-one billion, two hundred two million, one hundred twenty-two thousand, two hundred eleven".