121142134221457 has 2 divisors, whose sum is σ = 121142134221458. Its totient is φ = 121142134221456.

The previous prime is 121142134221439. The next prime is 121142134221461. The reversal of 121142134221457 is 754122431241121.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 61615215415296 + 59526918806161 = 7849536^2 + 7715369^2 .

It is a cyclic number.

It is not a de Polignac number, because 121142134221457 - 2¹⁵ = 121142134188689 is a prime.

It is a super-3 number, since 3×121142134221457³ (a number of 43 digits) contains 333 as substring.

It is not a weakly prime, because it can be changed into another prime (121142134221497) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60571067110728 + 60571067110729.

It is an arithmetic number, because the mean of its divisors is an integer number (60571067110729).

Almost surely, 2^{121142134221457} is an apocalyptic number.

It is an amenable number.

121142134221457 is a deficient number, since it is larger than the sum of its proper divisors (1).

121142134221457 is an equidigital number, since it uses as much as digits as its factorization.

121142134221457 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 107520, while the sum is 40.

Adding to 121142134221457 its reverse (754122431241121), we get a palindrome (875264565462578).

The spelling of 121142134221457 in words is "one hundred twenty-one trillion, one hundred forty-two billion, one hundred thirty-four million, two hundred twenty-one thousand, four hundred fifty-seven".