1321320121210 has 8 divisors (see below), whose sum is σ = 2378376218196. Its totient is φ = 528528048480.

The previous prime is 1321320121207. The next prime is 1321320121291. The reversal of 1321320121210 is 121210231231.

It can be written as a sum of positive squares in 2 ways, for example, as 1267427891601 + 53892229609 = 1125801^2 + 232147^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 66066006051 + ... + 66066006070.

Almost surely, 2^{1321320121210} is an apocalyptic number.

1321320121210 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1321320121210 is a deficient number, since it is larger than the sum of its proper divisors (1057056096986).

1321320121210 is a wasteful number, since it uses less digits than its factorization.

1321320121210 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 132132012128.

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

Adding to 1321320121210 its reverse (121210231231), we get a palindrome (1442530352441).

The spelling of 1321320121210 in words is "one trillion, three hundred twenty-one billion, three hundred twenty million, one hundred twenty-one thousand, two hundred ten".