10000122121221 has 16 divisors (see below), whose sum is σ = 13585485789504. Its totient is φ = 6540760937984.

The previous prime is 10000122121217. The next prime is 10000122121229. The reversal of 10000122121221 is 12212122100001.

It is a cyclic number.

It is not a de Polignac number, because 10000122121221 - 2² = 10000122121217 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 10000122121221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10000122121229) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4364770 + ... + 6249116.

It is an arithmetic number, because the mean of its divisors is an integer number (849092861844).

Almost surely, 2^{10000122121221} is an apocalyptic number.

It is an amenable number.

10000122121221 is a deficient number, since it is larger than the sum of its proper divisors (3585363668283).

10000122121221 is a wasteful number, since it uses less digits than its factorization.

10000122121221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1917780.

The product of its (nonzero) digits is 32, while the sum is 15.

Adding to 10000122121221 its reverse (12212122100001), we get a palindrome (22212244221222).

It can be divided in two parts, 10000 and 122121221, that added together give a palindrome (122131221).

The spelling of 10000122121221 in words is "ten trillion, one hundred twenty-two million, one hundred twenty-one thousand, two hundred twenty-one".