1321212004 has 12 divisors (see below), whose sum is σ = 2642424064. Its totient is φ = 566233704.

The previous prime is 1321211981. The next prime is 1321212019. The reversal of 1321212004 is 4002121231.

1321212004 is an admirable number.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 23593044 + ... + 23593099.

Almost surely, 2^1321212004 is an apocalyptic number.

1321212004 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

1321212004 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1321212004 is a wasteful number, since it uses less digits than its factorization.

1321212004 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 47186154 (or 47186152 counting only the distinct ones).

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

The square root of 1321212004 is about 36348.4800782646. The cubic root of 1321212004 is about 1097.2969455340.

Adding to 1321212004 its reverse (4002121231), we get a palindrome (5323333235).

The spelling of 1321212004 in words is "one billion, three hundred twenty-one million, two hundred twelve thousand, four".