266212101 has 4 divisors (see below), whose sum is σ = 354949472. Its totient is φ = 177474732.

The previous prime is 266212091. The next prime is 266212103. The reversal of 266212101 is 101212662.

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 not a de Polignac number, because 266212101 - 2¹⁹ = 265687813 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (266212103) 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, 44368681 + ... + 44368686.

It is an arithmetic number, because the mean of its divisors is an integer number (88737368).

Almost surely, 2^266212101 is an apocalyptic number.

It is an amenable number.

266212101 is a deficient number, since it is larger than the sum of its proper divisors (88737371).

266212101 is an equidigital number, since it uses as much as digits as its factorization.

266212101 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 88737370.

The product of its (nonzero) digits is 288, while the sum is 21.

The square root of 266212101 is about 16316.0075079659. The cubic root of 266212101 is about 643.2936497904.

Adding to 266212101 its reverse (101212662), we get a palindrome (367424763).

The spelling of 266212101 in words is "two hundred sixty-six million, two hundred twelve thousand, one hundred one".