1221420341041 has 4 divisors (see below), whose sum is σ = 1221433116784. Its totient is φ = 1221407565300.

The previous prime is 1221420341023. The next prime is 1221420341047. The reversal of 1221420341041 is 1401430241221.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 1221420341041 - 2¹⁷ = 1221420209969 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1221420340997 and 1221420341015.

It is not an unprimeable number, because it can be changed into a prime (1221420341047) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6243375 + ... + 6436036.

It is an arithmetic number, because the mean of its divisors is an integer number (305358279196).

Almost surely, 2^{1221420341041} is an apocalyptic number.

It is an amenable number.

1221420341041 is a deficient number, since it is larger than the sum of its proper divisors (12775743).

1221420341041 is an equidigital number, since it uses as much as digits as its factorization.

1221420341041 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12775742.

The product of its (nonzero) digits is 1536, while the sum is 25.

Adding to 1221420341041 its reverse (1401430241221), we get a palindrome (2622850582262).

The spelling of 1221420341041 in words is "one trillion, two hundred twenty-one billion, four hundred twenty million, three hundred forty-one thousand, forty-one".