1231321210 has 16 divisors (see below), whose sum is σ = 2533003776. Its totient is φ = 422167248.

The previous prime is 1231321207. The next prime is 1231321213. The reversal of 1231321210 is 121231321.

It is an interprime number because it is at equal distance from previous prime (1231321207) and next prime (1231321213).

It is a nialpdrome in base 14.

It is not an unprimeable number, because it can be changed into a prime (1231321213) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8795082 + ... + 8795221.

It is an arithmetic number, because the mean of its divisors is an integer number (158312736).

Almost surely, 2^1231321210 is an apocalyptic number.

1231321210 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1231321210 is an abundant number, since it is smaller than the sum of its proper divisors (1301682566).

1231321210 is a wasteful number, since it uses less digits than its factorization.

1231321210 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17590317.

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

The square root of 1231321210 is about 35090.1868048604. The cubic root of 1231321210 is about 1071.8247635566.

Adding to 1231321210 its reverse (121231321), we get a palindrome (1352552531).

The spelling of 1231321210 in words is "one billion, two hundred thirty-one million, three hundred twenty-one thousand, two hundred ten".