121210221320207 has 2 divisors, whose sum is σ = 121210221320208. Its totient is φ = 121210221320206.

The previous prime is 121210221320081. The next prime is 121210221320257. The reversal of 121210221320207 is 702023122012121.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 121210221320207 - 2³⁸ = 120935343413263 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (121210221320257) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60605110660103 + 60605110660104.

It is an arithmetic number, because the mean of its divisors is an integer number (60605110660104).

Almost surely, 2^{121210221320207} is an apocalyptic number.

121210221320207 is a deficient number, since it is larger than the sum of its proper divisors (1).

121210221320207 is an equidigital number, since it uses as much as digits as its factorization.

121210221320207 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1344, while the sum is 26.

Adding to 121210221320207 its reverse (702023122012121), we get a palindrome (823233343332328).

The spelling of 121210221320207 in words is "one hundred twenty-one trillion, two hundred ten billion, two hundred twenty-one million, three hundred twenty thousand, two hundred seven".