211461872890 has 8 divisors (see below), whose sum is σ = 380631371220. Its totient is φ = 84584749152.

The previous prime is 211461872887. The next prime is 211461872893. The reversal of 211461872890 is 98278164112.

211461872890 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (211461872887) and next prime (211461872893).

It can be written as a sum of positive squares in 2 ways, for example, as 195039706689 + 16422166201 = 441633^2 + 128149^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×211461872890² (a number of 23 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (211461872893) by changing a digit.

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, 10573093635 + ... + 10573093654.

Almost surely, 2^211461872890 is an apocalyptic number.

211461872890 is a deficient number, since it is larger than the sum of its proper divisors (169169498330).

211461872890 is a wasteful number, since it uses less digits than its factorization.

211461872890 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21146187296.

The product of its (nonzero) digits is 387072, while the sum is 49.

The spelling of 211461872890 in words is "two hundred eleven billion, four hundred sixty-one million, eight hundred seventy-two thousand, eight hundred ninety".