1212132331 has 4 divisors (see below), whose sum is σ = 1218904200. Its totient is φ = 1205360464.

The previous prime is 1212132307. The next prime is 1212132347. The reversal of 1212132331 is 1332312121.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1332312121 = 7 ⋅190330303.

It is a cyclic number.

It is not a de Polignac number, because 1212132331 - 2⁹ = 1212131819 is a prime.

It is a super-2 number, since 2×1212132331² = 2938529575710987122, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1212132299 and 1212132308.

It is not an unprimeable number, because it can be changed into a prime (1212132301) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3385666 + ... + 3386023.

It is an arithmetic number, because the mean of its divisors is an integer number (304726050).

Almost surely, 2^1212132331 is an apocalyptic number.

1212132331 is a deficient number, since it is larger than the sum of its proper divisors (6771869).

1212132331 is an equidigital number, since it uses as much as digits as its factorization.

1212132331 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6771868.

The product of its digits is 216, while the sum is 19.

The square root of 1212132331 is about 34815.6908735128. The cubic root of 1212132331 is about 1066.2278244374.

Adding to 1212132331 its reverse (1332312121), we get a palindrome (2544444452).

The spelling of 1212132331 in words is "one billion, two hundred twelve million, one hundred thirty-two thousand, three hundred thirty-one".