22078116901 has 4 divisors (see below), whose sum is σ = 22078420204. Its totient is φ = 22077813600.

The previous prime is 22078116883. The next prime is 22078116913. The reversal of 22078116901 is 10961187022.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 10961187022 = 2 ⋅5480593511.

It can be written as a sum of positive squares in 2 ways, for example, as 16021230625 + 6056886276 = 126575^2 + 77826^2 .

It is a 3-Lehmer number, since φ(22078116901) divides (22078116901-1)³.

It is a cyclic number.

It is not a de Polignac number, because 22078116901 - 2²⁵ = 22044562469 is a prime.

It is a deceptive number, since it divides R_22078116900.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22078113901) 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 3 ways as a sum of consecutive naturals, for example, 30331 + ... + 212311.

It is an arithmetic number, because the mean of its divisors is an integer number (5519605051).

Almost surely, 2^22078116901 is an apocalyptic number.

22078116901 is the 121321-st pentagonal number.

It is an amenable number.

22078116901 is a deficient number, since it is larger than the sum of its proper divisors (303303).

22078116901 is a wasteful number, since it uses less digits than its factorization.

22078116901 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 303302.

The product of its (nonzero) digits is 12096, while the sum is 37.

The spelling of 22078116901 in words is "twenty-two billion, seventy-eight million, one hundred sixteen thousand, nine hundred one".