1241043220421 has 4 divisors (see below), whose sum is σ = 1242793634700. Its totient is φ = 1239292806144.

The previous prime is 1241043220357. The next prime is 1241043220429. The reversal of 1241043220421 is 1240223401421.

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 218052575521 + 1022990644900 = 466961^2 + 1011430^2 .

It is a cyclic number.

It is not a de Polignac number, because 1241043220421 - 2⁶ = 1241043220357 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1241043220429) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 875206076 + ... + 875207493.

It is an arithmetic number, because the mean of its divisors is an integer number (310698408675).

Almost surely, 2^{1241043220421} is an apocalyptic number.

It is an amenable number.

1241043220421 is a deficient number, since it is larger than the sum of its proper divisors (1750414279).

1241043220421 is an equidigital number, since it uses as much as digits as its factorization.

1241043220421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1750414278.

The product of its (nonzero) digits is 3072, while the sum is 26.

Adding to 1241043220421 its reverse (1240223401421), we get a palindrome (2481266621842).

The spelling of 1241043220421 in words is "one trillion, two hundred forty-one billion, forty-three million, two hundred twenty thousand, four hundred twenty-one".