1211201304 has 16 divisors (see below), whose sum is σ = 3028003320. Its totient is φ = 403733760.

The previous prime is 1211201293. The next prime is 1211201309. The reversal of 1211201304 is 4031021121.

It is a super-2 number, since 2×1211201304² = 2934017197622600832, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1211201309) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 25233337 + ... + 25233384.

Almost surely, 2^1211201304 is an apocalyptic number.

It is an amenable number.

1211201304 is an abundant number, since it is smaller than the sum of its proper divisors (1816802016).

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

1211201304 is a wasteful number, since it uses less digits than its factorization.

1211201304 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 50466730 (or 50466726 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 15.

The square root of 1211201304 is about 34802.3175090395. The cubic root of 1211201304 is about 1065.9547681235.

Adding to 1211201304 its reverse (4031021121), we get a palindrome (5242222425).

The spelling of 1211201304 in words is "one billion, two hundred eleven million, two hundred one thousand, three hundred four".