1002212321 has 4 divisors (see below), whose sum is σ = 1093322544. Its totient is φ = 911102100.

The previous prime is 1002212297. The next prime is 1002212329. The reversal of 1002212321 is 1232122001.

It is a happy number.

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 1002212321 - 2¹⁸ = 1001950177 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1002212296 and 1002212305.

It is not an unprimeable number, because it can be changed into a prime (1002212329) 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, 45555095 + ... + 45555116.

It is an arithmetic number, because the mean of its divisors is an integer number (273330636).

Almost surely, 2^1002212321 is an apocalyptic number.

1002212321 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1002212321 is a deficient number, since it is larger than the sum of its proper divisors (91110223).

1002212321 is an equidigital number, since it uses as much as digits as its factorization.

1002212321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 91110222.

The product of its (nonzero) digits is 48, while the sum is 14.

The square root of 1002212321 is about 31657.7371427586. The cubic root of 1002212321 is about 1000.7368971825.

Adding to 1002212321 its reverse (1232122001), we get a palindrome (2234334322).

The spelling of 1002212321 in words is "one billion, two million, two hundred twelve thousand, three hundred twenty-one".