1213021204 has 12 divisors (see below), whose sum is σ = 2125664800. Its totient is φ = 605688408.

The previous prime is 1213021177. The next prime is 1213021207. The reversal of 1213021204 is 4021203121.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1213021207) 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, 202224 + ... + 208135.

Almost surely, 2^1213021204 is an apocalyptic number.

It is an amenable number.

1213021204 is a deficient number, since it is larger than the sum of its proper divisors (912643596).

1213021204 is a wasteful number, since it uses less digits than its factorization.

1213021204 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 411102 (or 411100 counting only the distinct ones).

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

The square root of 1213021204 is about 34828.4539421433. The cubic root of 1213021204 is about 1066.4883871750.

Adding to 1213021204 its reverse (4021203121), we get a palindrome (5234224325).

The spelling of 1213021204 in words is "one billion, two hundred thirteen million, twenty-one thousand, two hundred four".