1211304413 has 16 divisors (see below), whose sum is σ = 1338664320. Its totient is φ = 1086888000.

The previous prime is 1211304379. The next prime is 1211304421. The reversal of 1211304413 is 3144031121.

It is not a de Polignac number, because 1211304413 - 2¹² = 1211300317 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1211304463) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 397331 + ... + 400367.

It is an arithmetic number, because the mean of its divisors is an integer number (83666520).

Almost surely, 2^1211304413 is an apocalyptic number.

It is an amenable number.

1211304413 is a deficient number, since it is larger than the sum of its proper divisors (127359907).

1211304413 is a wasteful number, since it uses less digits than its factorization.

1211304413 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3508.

The product of its (nonzero) digits is 288, while the sum is 20.

The square root of 1211304413 is about 34803.7988300128. The cubic root of 1211304413 is about 1065.9850153420.

Adding to 1211304413 its reverse (3144031121), we get a palindrome (4355335534).

The spelling of 1211304413 in words is "one billion, two hundred eleven million, three hundred four thousand, four hundred thirteen".