1213232211 has 6 divisors (see below), whose sum is σ = 1752446540. Its totient is φ = 808821468.

The previous prime is 1213232203. The next prime is 1213232249. The reversal of 1213232211 is 1122323121.

1213232211 is a `hidden beast` number, since 121 + 323 + 221 + 1 = 666.

It is not a de Polignac number, because 1213232211 - 2³ = 1213232203 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1213232201) 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, 67401781 + ... + 67401798.

Almost surely, 2^1213232211 is an apocalyptic number.

1213232211 is a deficient number, since it is larger than the sum of its proper divisors (539214329).

1213232211 is a wasteful number, since it uses less digits than its factorization.

1213232211 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 134803585 (or 134803582 counting only the distinct ones).

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

The square root of 1213232211 is about 34831.4830433618. The cubic root of 1213232211 is about 1066.5502227162.

Adding to 1213232211 its reverse (1122323121), we get a palindrome (2335555332).

The spelling of 1213232211 in words is "one billion, two hundred thirteen million, two hundred thirty-two thousand, two hundred eleven".