22121010002009 has 4 divisors (see below), whose sum is σ = 22140813951204. Its totient is φ = 22101206052816.

The previous prime is 22121010001957. The next prime is 22121010002027. The reversal of 22121010002009 is 90020001012122.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 2524921000000 + 19596089002009 = 1589000^2 + 4426747^2 .

It is a cyclic number.

It is not a de Polignac number, because 22121010002009 - 2²⁴ = 22120993224793 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (22121010002089) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9901972922 + ... + 9901975155.

It is an arithmetic number, because the mean of its divisors is an integer number (5535203487801).

Almost surely, 2^{22121010002009} is an apocalyptic number.

It is an amenable number.

22121010002009 is a deficient number, since it is larger than the sum of its proper divisors (19803949195).

22121010002009 is a wasteful number, since it uses less digits than its factorization.

22121010002009 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19803949194.

The product of its (nonzero) digits is 144, while the sum is 20.

The spelling of 22121010002009 in words is "twenty-two trillion, one hundred twenty-one billion, ten million, two thousand, nine".