1312121230 has 32 divisors (see below), whose sum is σ = 2703798720. Its totient is φ = 449107200.

The previous prime is 1312121207. The next prime is 1312121249. The reversal of 1312121230 is 321212131.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 26476 + ... + 57664.

It is an arithmetic number, because the mean of its divisors is an integer number (84493710).

Almost surely, 2^1312121230 is an apocalyptic number.

1312121230 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1312121230 is an abundant number, since it is smaller than the sum of its proper divisors (1391677490).

1312121230 is a wasteful number, since it uses less digits than its factorization.

1312121230 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31804.

The product of its (nonzero) digits is 72, while the sum is 16.

The square root of 1312121230 is about 36223.2139656326. The cubic root of 1312121230 is about 1094.7744522696.

Adding to 1312121230 its reverse (321212131), we get a palindrome (1633333361).

Subtracting from 1312121230 its reverse (321212131), we obtain a palindrome (990909099).

The spelling of 1312121230 in words is "one billion, three hundred twelve million, one hundred twenty-one thousand, two hundred thirty".