221121121000010 has 64 divisors (see below), whose sum is σ = 496240453658880. Its totient is φ = 68919452536320.

The previous prime is 221121120999997. The next prime is 221121121000027. The reversal of 221121121000010 is 10000121121122.

It is a Harshad number since it is a multiple of its sum of digits (14).

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 34856942 + ... + 40709318.

It is an arithmetic number, because the mean of its divisors is an integer number (7753757088420).

Almost surely, 2^{221121121000010} is an apocalyptic number.

221121121000010 is an abundant number, since it is smaller than the sum of its proper divisors (275119332658870).

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

221121121000010 is a wasteful number, since it uses less digits than its factorization.

221121121000010 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5901471.

The product of its (nonzero) digits is 16, while the sum is 14.

Adding to 221121121000010 its reverse (10000121121122), we get a palindrome (231121242121132).

The spelling of 221121121000010 in words is "two hundred twenty-one trillion, one hundred twenty-one billion, one hundred twenty-one million, ten", and thus it is an aban number.