1421003221 has 4 divisors (see below), whose sum is σ = 1550185344. Its totient is φ = 1291821100.

The previous prime is 1421003197. The next prime is 1421003237. The reversal of 1421003221 is 1223001241.

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 1421003221 - 2¹³ = 1420995029 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1421003195 and 1421003204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1421003251) 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, 64591045 + ... + 64591066.

It is an arithmetic number, because the mean of its divisors is an integer number (387546336).

Almost surely, 2^1421003221 is an apocalyptic number.

1421003221 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1421003221 is a deficient number, since it is larger than the sum of its proper divisors (129182123).

1421003221 is a wasteful number, since it uses less digits than its factorization.

1421003221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 129182122.

The product of its (nonzero) digits is 96, while the sum is 16.

The square root of 1421003221 is about 37696.1963731091. The cubic root of 1421003221 is about 1124.2554997770.

Adding to 1421003221 its reverse (1223001241), we get a palindrome (2644004462).

The spelling of 1421003221 in words is "one billion, four hundred twenty-one million, three thousand, two hundred twenty-one".