2121221011207 has 2 divisors, whose sum is σ = 2121221011208. Its totient is φ = 2121221011206.

The previous prime is 2121221011187. The next prime is 2121221011243. The reversal of 2121221011207 is 7021101221212.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2121221011207 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2121221017207) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1060610505603 + 1060610505604.

It is an arithmetic number, because the mean of its divisors is an integer number (1060610505604).

Almost surely, 2^{2121221011207} is an apocalyptic number.

2121221011207 is a deficient number, since it is larger than the sum of its proper divisors (1).

2121221011207 is an equidigital number, since it uses as much as digits as its factorization.

2121221011207 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 224, while the sum is 22.

Adding to 2121221011207 its reverse (7021101221212), we get a palindrome (9142322232419).

The spelling of 2121221011207 in words is "two trillion, one hundred twenty-one billion, two hundred twenty-one million, eleven thousand, two hundred seven".