1363421221 has 4 divisors (see below), whose sum is σ = 1370559744. Its totient is φ = 1356282700.

The previous prime is 1363421179. The next prime is 1363421239. The reversal of 1363421221 is 1221243631.

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 1363421221 - 2¹¹ = 1363419173 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 (1363421281) 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, 3568975 + ... + 3569356.

It is an arithmetic number, because the mean of its divisors is an integer number (342639936).

Almost surely, 2^1363421221 is an apocalyptic number.

It is an amenable number.

1363421221 is a deficient number, since it is larger than the sum of its proper divisors (7138523).

1363421221 is an equidigital number, since it uses as much as digits as its factorization.

1363421221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7138522.

The product of its digits is 1728, while the sum is 25.

The square root of 1363421221 is about 36924.5341338249. The cubic root of 1363421221 is about 1108.8599123850.

Adding to 1363421221 its reverse (1221243631), we get a palindrome (2584664852).

The spelling of 1363421221 in words is "one billion, three hundred sixty-three million, four hundred twenty-one thousand, two hundred twenty-one".