1221346041 has 4 divisors (see below), whose sum is σ = 1628461392. Its totient is φ = 814230692.

The previous prime is 1221346037. The next prime is 1221346051. The reversal of 1221346041 is 1406431221.

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 1221346041 - 2² = 1221346037 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1221346051) 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, 203557671 + ... + 203557676.

It is an arithmetic number, because the mean of its divisors is an integer number (407115348).

Almost surely, 2^1221346041 is an apocalyptic number.

It is an amenable number.

1221346041 is a deficient number, since it is larger than the sum of its proper divisors (407115351).

1221346041 is an equidigital number, since it uses as much as digits as its factorization.

1221346041 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 407115350.

The product of its (nonzero) digits is 1152, while the sum is 24.

The square root of 1221346041 is about 34947.7616021398. The cubic root of 1221346041 is about 1068.9225597094.

Adding to 1221346041 its reverse (1406431221), we get a palindrome (2627777262).

The spelling of 1221346041 in words is "one billion, two hundred twenty-one million, three hundred forty-six thousand, forty-one".