22121000000002 has 8 divisors (see below), whose sum is σ = 33181529036796. Its totient is φ = 11060490321072.

The previous prime is 22120999999997. The next prime is 22121000000017. The reversal of 22121000000002 is 20000000012122.

It can be written as a sum of positive squares in 2 ways, for example, as 20721059057521 + 1399940942481 = 4552039^2 + 1183191^2 .

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, 1529973 + ... + 6825160.

Almost surely, 2^{22121000000002} is an apocalyptic number.

22121000000002 is a deficient number, since it is larger than the sum of its proper divisors (11060529036794).

22121000000002 is a wasteful number, since it uses less digits than its factorization.

22121000000002 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9678932.

The product of its (nonzero) digits is 16, while the sum is 10.

Adding to 22121000000002 its reverse (20000000012122), we get a palindrome (42121000012124).

The spelling of 22121000000002 in words is "twenty-two trillion, one hundred twenty-one billion, two", and thus it is an aban number.