1221105143410 has 16 divisors (see below), whose sum is σ = 2198369439936. Its totient is φ = 488357572528.

The previous prime is 1221105143369. The next prime is 1221105143413. The reversal of 1221105143410 is 143415011221.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (1221105143413) 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, 10499884 + ... + 10615543.

It is an arithmetic number, because the mean of its divisors is an integer number (137398089996).

Almost surely, 2^{1221105143410} is an apocalyptic number.

1221105143410 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1221105143410 is a deficient number, since it is larger than the sum of its proper divisors (977264296526).

1221105143410 is a wasteful number, since it uses less digits than its factorization.

1221105143410 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21121217.

The product of its (nonzero) digits is 960, while the sum is 25.

The spelling of 1221105143410 in words is "one trillion, two hundred twenty-one billion, one hundred five million, one hundred forty-three thousand, four hundred ten".