1002421321 has 4 divisors (see below), whose sum is σ = 1093550544. Its totient is φ = 911292100.

The previous prime is 1002421313. The next prime is 1002421367. The reversal of 1002421321 is 1231242001.

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, and also an emirpimes, since its reverse is a distinct semiprime: 1231242001 = 11 ⋅111931091.

It is a cyclic number.

It is not a de Polignac number, because 1002421321 - 2³ = 1002421313 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1002421295 and 1002421304.

It is not an unprimeable number, because it can be changed into a prime (1002425321) 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, 45564595 + ... + 45564616.

It is an arithmetic number, because the mean of its divisors is an integer number (273387636).

Almost surely, 2^1002421321 is an apocalyptic number.

1002421321 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1002421321 is a deficient number, since it is larger than the sum of its proper divisors (91129223).

1002421321 is an equidigital number, since it uses as much as digits as its factorization.

1002421321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 91129222.

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

The square root of 1002421321 is about 31661.0379014965. The cubic root of 1002421321 is about 1000.8064564532.

Adding to 1002421321 its reverse (1231242001), we get a palindrome (2233663322).

The spelling of 1002421321 in words is "one billion, two million, four hundred twenty-one thousand, three hundred twenty-one".