121311133020373 has 2 divisors, whose sum is σ = 121311133020374. Its totient is φ = 121311133020372.

The previous prime is 121311133020317. The next prime is 121311133020479. The reversal of 121311133020373 is 373020331113121.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 85555433145924 + 35755699874449 = 9249618^2 + 5979607^2 .

It is a cyclic number.

It is not a de Polignac number, because 121311133020373 - 2¹⁷ = 121311132889301 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (121311133020073) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60655566510186 + 60655566510187.

It is an arithmetic number, because the mean of its divisors is an integer number (60655566510187).

Almost surely, 2^{121311133020373} is an apocalyptic number.

It is an amenable number.

121311133020373 is a deficient number, since it is larger than the sum of its proper divisors (1).

121311133020373 is an equidigital number, since it uses as much as digits as its factorization.

121311133020373 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 6804, while the sum is 31.

Adding to 121311133020373 its reverse (373020331113121), we get a palindrome (494331464133494).

The spelling of 121311133020373 in words is "one hundred twenty-one trillion, three hundred eleven billion, one hundred thirty-three million, twenty thousand, three hundred seventy-three".