1212030231 has 4 divisors (see below), whose sum is σ = 1616040312. Its totient is φ = 808020152.

The previous prime is 1212030227. The next prime is 1212030257. The reversal of 1212030231 is 1320302121.

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 1212030231 - 2² = 1212030227 is a prime.

It is a super-2 number, since 2×1212030231² = 2938034561715826722, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 1212030231.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1212030221) 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, 202005036 + ... + 202005041.

It is an arithmetic number, because the mean of its divisors is an integer number (404010078).

Almost surely, 2^1212030231 is an apocalyptic number.

1212030231 is a deficient number, since it is larger than the sum of its proper divisors (404010081).

1212030231 is an equidigital number, since it uses as much as digits as its factorization.

1212030231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 404010080.

The product of its (nonzero) digits is 72, while the sum is 15.

The square root of 1212030231 is about 34814.2245497440. The cubic root of 1212030231 is about 1066.1978868597.

Adding to 1212030231 its reverse (1320302121), we get a palindrome (2532332352).

The spelling of 1212030231 in words is "one billion, two hundred twelve million, thirty thousand, two hundred thirty-one".