121221120313 has 2 divisors, whose sum is σ = 121221120314. Its totient is φ = 121221120312.

The previous prime is 121221120277. The next prime is 121221120323. The reversal of 121221120313 is 313021122121.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 63934133904 + 57286986409 = 252852^2 + 239347^2 .

It is a cyclic number.

It is not a de Polignac number, because 121221120313 - 2⁹ = 121221119801 is a prime.

It is not a weakly prime, because it can be changed into another prime (121221120323) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60610560156 + 60610560157.

It is an arithmetic number, because the mean of its divisors is an integer number (60610560157).

Almost surely, 2^121221120313 is an apocalyptic number.

It is an amenable number.

121221120313 is a deficient number, since it is larger than the sum of its proper divisors (1).

121221120313 is an equidigital number, since it uses as much as digits as its factorization.

121221120313 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 144, while the sum is 19.

Adding to 121221120313 its reverse (313021122121), we get a palindrome (434242242434).

The spelling of 121221120313 in words is "one hundred twenty-one billion, two hundred twenty-one million, one hundred twenty thousand, three hundred thirteen".