121012210221137 has 2 divisors, whose sum is σ = 121012210221138. Its totient is φ = 121012210221136.

The previous prime is 121012210221121. The next prime is 121012210221239. The reversal of 121012210221137 is 731122012210121.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 105792723942481 + 15219486278656 = 10285559^2 + 3901216^2 .

It is a cyclic number.

It is not a de Polignac number, because 121012210221137 - 2⁴ = 121012210221121 is a prime.

It is a super-3 number, since 3×121012210221137³ (a number of 43 digits) contains 333 as substring.

It is not a weakly prime, because it can be changed into another prime (121012210221437) 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, 60506105110568 + 60506105110569.

It is an arithmetic number, because the mean of its divisors is an integer number (60506105110569).

Almost surely, 2^{121012210221137} is an apocalyptic number.

It is an amenable number.

121012210221137 is a deficient number, since it is larger than the sum of its proper divisors (1).

121012210221137 is an equidigital number, since it uses as much as digits as its factorization.

121012210221137 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 672, while the sum is 26.

Adding to 121012210221137 its reverse (731122012210121), we get a palindrome (852134222431258).

The spelling of 121012210221137 in words is "one hundred twenty-one trillion, twelve billion, two hundred ten million, two hundred twenty-one thousand, one hundred thirty-seven".