1321121110210 has 64 divisors (see below), whose sum is σ = 2718320394240. Its totient is φ = 457597497280.

The previous prime is 1321121110193. The next prime is 1321121110277. The reversal of 1321121110210 is 120111211231.

It is a happy number.

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 31 ways as a sum of consecutive naturals, for example, 487762 + ... + 1697101.

It is an arithmetic number, because the mean of its divisors is an integer number (42473756160).

Almost surely, 2^{1321121110210} is an apocalyptic number.

1321121110210 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1321121110210 is an abundant number, since it is smaller than the sum of its proper divisors (1397199284030).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1321121110210 is a wasteful number, since it uses less digits than its factorization.

1321121110210 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2185143.

The product of its (nonzero) digits is 24, while the sum is 16.

Adding to 1321121110210 its reverse (120111211231), we get a palindrome (1441232321441).

The spelling of 1321121110210 in words is "one trillion, three hundred twenty-one billion, one hundred twenty-one million, one hundred ten thousand, two hundred ten".