121221220132211 has 2 divisors, whose sum is σ = 121221220132212. Its totient is φ = 121221220132210.

The previous prime is 121221220132189. The next prime is 121221220132241. The reversal of 121221220132211 is 112231022122121.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 121221220132211 - 2⁶ = 121221220132147 is a prime.

It is not a weakly prime, because it can be changed into another prime (121221220132241) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60610610066105 + 60610610066106.

It is an arithmetic number, because the mean of its divisors is an integer number (60610610066106).

Almost surely, 2^{121221220132211} is an apocalyptic number.

121221220132211 is a deficient number, since it is larger than the sum of its proper divisors (1).

121221220132211 is an equidigital number, since it uses as much as digits as its factorization.

121221220132211 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 384, while the sum is 23.

Adding to 121221220132211 its reverse (112231022122121), we get a palindrome (233452242254332).

The spelling of 121221220132211 in words is "one hundred twenty-one trillion, two hundred twenty-one billion, two hundred twenty million, one hundred thirty-two thousand, two hundred eleven".