1211343201 has 16 divisors (see below), whose sum is σ = 1803985920. Its totient is φ = 803330640.

The previous prime is 1211343191. The next prime is 1211343209. The reversal of 1211343201 is 1023431121.

1211343201 is a `hidden beast` number, since 121 + 1 + 343 + 201 = 666.

It is not a de Polignac number, because 1211343201 - 2⁵ = 1211343169 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1211343209) 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, 112290 + ... + 122603.

It is an arithmetic number, because the mean of its divisors is an integer number (112749120).

Almost surely, 2^1211343201 is an apocalyptic number.

It is an amenable number.

1211343201 is a deficient number, since it is larger than the sum of its proper divisors (592642719).

1211343201 is a wasteful number, since it uses less digits than its factorization.

1211343201 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 235093 (or 235087 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 18.

The square root of 1211343201 is about 34804.3560635734. The cubic root of 1211343201 is about 1065.9963934302.

Adding to 1211343201 its reverse (1023431121), we get a palindrome (2234774322).

The spelling of 1211343201 in words is "one billion, two hundred eleven million, three hundred forty-three thousand, two hundred one".