121042031142121 has 2 divisors, whose sum is σ = 121042031142122. Its totient is φ = 121042031142120.

The previous prime is 121042031142083. The next prime is 121042031142139. The reversal of 121042031142121 is 121241130240121.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 66786078675625 + 54255952466496 = 8172275^2 + 7365864^2 .

It is an emirp because it is prime and its reverse (121241130240121) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 121042031142121 - 2²⁵ = 121041997587689 is a prime.

It is not a weakly prime, because it can be changed into another prime (121042031142191) 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, 60521015571060 + 60521015571061.

It is an arithmetic number, because the mean of its divisors is an integer number (60521015571061).

Almost surely, 2^{121042031142121} is an apocalyptic number.

It is an amenable number.

121042031142121 is a deficient number, since it is larger than the sum of its proper divisors (1).

121042031142121 is an equidigital number, since it uses as much as digits as its factorization.

121042031142121 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 768, while the sum is 25.

Adding to 121042031142121 its reverse (121241130240121), we get a palindrome (242283161382242).

The spelling of 121042031142121 in words is "one hundred twenty-one trillion, forty-two billion, thirty-one million, one hundred forty-two thousand, one hundred twenty-one".