1213322004 has 60 divisors (see below), whose sum is σ = 3231755604. Its totient is φ = 396804096.

The previous prime is 1213322003. The next prime is 1213322009. The reversal of 1213322004 is 4002233121.

It can be written as a sum of positive squares in 2 ways, for example, as 1033493904 + 179828100 = 32148^2 + 13410^2 .

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1213322003) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 18157 + ... + 52500.

Almost surely, 2^1213322004 is an apocalyptic number.

It is an amenable number.

1213322004 is an abundant number, since it is smaller than the sum of its proper divisors (2018433600).

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

1213322004 is a wasteful number, since it uses less digits than its factorization.

1213322004 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 70726 (or 70715 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 18.

The square root of 1213322004 is about 34832.7719827177. The cubic root of 1213322004 is about 1066.5765343546.

Adding to 1213322004 its reverse (4002233121), we get a palindrome (5215555125).

The spelling of 1213322004 in words is "one billion, two hundred thirteen million, three hundred twenty-two thousand, four".