1321120231210 has 32 divisors (see below), whose sum is σ = 2561312737872. Its totient is φ = 487727385600.

The previous prime is 1321120231187. The next prime is 1321120231241. The reversal of 1321120231210 is 121320211231.

It can be written as a sum of positive squares in 8 ways, for example, as 506518313401 + 814601917809 = 711701^2 + 902553^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 164610 + ... + 1633810.

Almost surely, 2^{1321120231210} is an apocalyptic number.

1321120231210 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1321120231210 is a deficient number, since it is larger than the sum of its proper divisors (1240192506662).

1321120231210 is a wasteful number, since it uses less digits than its factorization.

1321120231210 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1476138.

The product of its (nonzero) digits is 144, while the sum is 19.

Adding to 1321120231210 its reverse (121320211231), we get a palindrome (1442440442441).

The spelling of 1321120231210 in words is "one trillion, three hundred twenty-one billion, one hundred twenty million, two hundred thirty-one thousand, two hundred ten".