1212330131 has 4 divisors (see below), whose sum is σ = 1276137000. Its totient is φ = 1148523264.

The previous prime is 1212330127. The next prime is 1212330137. The reversal of 1212330131 is 1310332121.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1212330131 - 2² = 1212330127 is a prime.

It is a super-2 number, since 2×1212330131² = 2939488693060954322, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1212330137) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 31903406 + ... + 31903443.

It is an arithmetic number, because the mean of its divisors is an integer number (319034250).

Almost surely, 2^1212330131 is an apocalyptic number.

1212330131 is a deficient number, since it is larger than the sum of its proper divisors (63806869).

1212330131 is an equidigital number, since it uses as much as digits as its factorization.

1212330131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 63806868.

The product of its (nonzero) digits is 108, while the sum is 17.

The square root of 1212330131 is about 34818.5314308344. The cubic root of 1212330131 is about 1066.2858182135.

Adding to 1212330131 its reverse (1310332121), we get a palindrome (2522662252).

The spelling of 1212330131 in words is "one billion, two hundred twelve million, three hundred thirty thousand, one hundred thirty-one".