1212421122041 has 4 divisors (see below), whose sum is σ = 1213152820212. Its totient is φ = 1211689423872.

The previous prime is 1212421122023. The next prime is 1212421122043. The reversal of 1212421122041 is 1402211242121.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 238852125625 + 973568996416 = 488725^2 + 986696^2 .

It is a cyclic number.

It is not a de Polignac number, because 1212421122041 - 2²⁶ = 1212354013177 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1212421121998 and 1212421122016.

It is not an unprimeable number, because it can be changed into a prime (1212421122043) 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 in 3 ways as a sum of consecutive naturals, for example, 365846600 + ... + 365849913.

It is an arithmetic number, because the mean of its divisors is an integer number (303288205053).

Almost surely, 2^{1212421122041} is an apocalyptic number.

It is an amenable number.

1212421122041 is a deficient number, since it is larger than the sum of its proper divisors (731698171).

1212421122041 is an equidigital number, since it uses as much as digits as its factorization.

1212421122041 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 731698170.

The product of its (nonzero) digits is 512, while the sum is 23.

Adding to 1212421122041 its reverse (1402211242121), we get a palindrome (2614632364162).

The spelling of 1212421122041 in words is "one trillion, two hundred twelve billion, four hundred twenty-one million, one hundred twenty-two thousand, forty-one".