211954012266 has 32 divisors (see below), whose sum is σ = 435419647488. Its totient is φ = 68733213120.

The previous prime is 211954012223. The next prime is 211954012267. The reversal of 211954012266 is 662210459112.

It is not an unprimeable number, because it can be changed into a prime (211954012267) 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 15 ways as a sum of consecutive naturals, for example, 1849351 + ... + 1960613.

It is an arithmetic number, because the mean of its divisors is an integer number (13606863984).

Almost surely, 2^211954012266 is an apocalyptic number.

211954012266 is an abundant number, since it is smaller than the sum of its proper divisors (223465635222).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

211954012266 is a wasteful number, since it uses less digits than its factorization.

211954012266 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 119886.

The product of its (nonzero) digits is 51840, while the sum is 39.

The spelling of 211954012266 in words is "two hundred eleven billion, nine hundred fifty-four million, twelve thousand, two hundred sixty-six".