2188328920901 has 4 divisors (see below), whose sum is σ = 2189215963872. Its totient is φ = 2187441877932.

The previous prime is 2188328920849. The next prime is 2188328920949. The reversal of 2188328920901 is 1090298238812.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2188328920901 is a prime.

It is a super-2 number, since 2×2188328920901² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2188328920951) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 443517785 + ... + 443522718.

It is an arithmetic number, because the mean of its divisors is an integer number (547303990968).

Almost surely, 2^{2188328920901} is an apocalyptic number.

It is an amenable number.

2188328920901 is a deficient number, since it is larger than the sum of its proper divisors (887042971).

2188328920901 is an equidigital number, since it uses as much as digits as its factorization.

2188328920901 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 887042970.

The product of its (nonzero) digits is 995328, while the sum is 53.

The spelling of 2188328920901 in words is "two trillion, one hundred eighty-eight billion, three hundred twenty-eight million, nine hundred twenty thousand, nine hundred one".