1220304401 has 4 divisors (see below), whose sum is σ = 1221809904. Its totient is φ = 1218798900.

The previous prime is 1220304373. The next prime is 1220304413. The reversal of 1220304401 is 1044030221.

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 1220304401 - 2²² = 1216110097 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1220304401.

It is not an unprimeable number, because it can be changed into a prime (1220304101) 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, 751535 + ... + 753156.

It is an arithmetic number, because the mean of its divisors is an integer number (305452476).

Almost surely, 2^1220304401 is an apocalyptic number.

It is an amenable number.

1220304401 is a deficient number, since it is larger than the sum of its proper divisors (1505503).

1220304401 is an equidigital number, since it uses as much as digits as its factorization.

1220304401 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1505502.

The product of its (nonzero) digits is 192, while the sum is 17.

The square root of 1220304401 is about 34932.8556090108. The cubic root of 1220304401 is about 1068.6185920260.

Adding to 1220304401 its reverse (1044030221), we get a palindrome (2264334622).

The spelling of 1220304401 in words is "one billion, two hundred twenty million, three hundred four thousand, four hundred one".