1361617221 has 8 divisors (see below), whose sum is σ = 1817606560. Its totient is φ = 906686352.

The previous prime is 1361617217. The next prime is 1361617289. The reversal of 1361617221 is 1227161631.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1361617221 - 2² = 1361617217 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1361617211) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 261610 + ... + 266763.

It is an arithmetic number, because the mean of its divisors is an integer number (227200820).

Almost surely, 2^1361617221 is an apocalyptic number.

It is an amenable number.

1361617221 is a deficient number, since it is larger than the sum of its proper divisors (455989339).

1361617221 is an equidigital number, since it uses as much as digits as its factorization.

1361617221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 529235.

The product of its digits is 3024, while the sum is 30.

The square root of 1361617221 is about 36900.0978453987. The cubic root of 1361617221 is about 1108.3706367882.

Adding to 1361617221 its reverse (1227161631), we get a palindrome (2588778852).

The spelling of 1361617221 in words is "one billion, three hundred sixty-one million, six hundred seventeen thousand, two hundred twenty-one".