1212130331 has 4 divisors (see below), whose sum is σ = 1212657600. Its totient is φ = 1211603064.

The previous prime is 1212130319. The next prime is 1212130343. The reversal of 1212130331 is 1330312121.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1330312121 = 26227 ⋅50723.

It is an interprime number because it is at equal distance from previous prime (1212130319) and next prime (1212130343).

It is a cyclic number.

It is not a de Polignac number, because 1212130331 - 2¹⁸ = 1211868187 is a prime.

It is a super-2 number, since 2×1212130331² = 2938519878660339122, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1212130301) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 260171 + ... + 264788.

It is an arithmetic number, because the mean of its divisors is an integer number (303164400).

Almost surely, 2^1212130331 is an apocalyptic number.

1212130331 is a deficient number, since it is larger than the sum of its proper divisors (527269).

1212130331 is an equidigital number, since it uses as much as digits as its factorization.

1212130331 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 527268.

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

The square root of 1212130331 is about 34815.6621508194. The cubic root of 1212130331 is about 1066.2272380172.

Adding to 1212130331 its reverse (1330312121), we get a palindrome (2542442452).

The spelling of 1212130331 in words is "one billion, two hundred twelve million, one hundred thirty thousand, three hundred thirty-one".