1212133311 has 6 divisors (see below), whose sum is σ = 1750859240. Its totient is φ = 808088868.

The previous prime is 1212133309. The next prime is 1212133331. The reversal of 1212133311 is 1133312121.

1212133311 is a `hidden beast` number, since 121 + 213 + 331 + 1 = 666.

It is not a de Polignac number, because 1212133311 - 2¹ = 1212133309 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 (1212133331) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 67340731 + ... + 67340748.

Almost surely, 2^1212133311 is an apocalyptic number.

1212133311 is a deficient number, since it is larger than the sum of its proper divisors (538725929).

1212133311 is a wasteful number, since it uses less digits than its factorization.

1212133311 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 134681485 (or 134681482 counting only the distinct ones).

The product of its digits is 108, while the sum is 18.

The square root of 1212133311 is about 34815.7049476239. The cubic root of 1212133311 is about 1066.2281117831.

Adding to 1212133311 its reverse (1133312121), we get a palindrome (2345445432).

The spelling of 1212133311 in words is "one billion, two hundred twelve million, one hundred thirty-three thousand, three hundred eleven".