211973769263871 has 24 divisors (see below), whose sum is σ = 316182391125120. Its totient is φ = 136704852518400.

The previous prime is 211973769263713. The next prime is 211973769263909. The reversal of 211973769263871 is 178362967379112.

211973769263871 is a `hidden beast` number, since 2 + 1 + 1 + 97 + 3 + 76 + 92 + 6 + 387 + 1 = 666.

It is not a de Polignac number, because 211973769263871 - 2⁹ = 211973769263359 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 211973769263871.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (211973769263071) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 144876270 + ... + 146332091.

It is an arithmetic number, because the mean of its divisors is an integer number (13174266296880).

Almost surely, 2^{211973769263871} is an apocalyptic number.

211973769263871 is a deficient number, since it is larger than the sum of its proper divisors (104208621861249).

211973769263871 is a wasteful number, since it uses less digits than its factorization.

211973769263871 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 291211007 (or 291211004 counting only the distinct ones).

The product of its digits is 288054144, while the sum is 72.

The spelling of 211973769263871 in words is "two hundred eleven trillion, nine hundred seventy-three billion, seven hundred sixty-nine million, two hundred sixty-three thousand, eight hundred seventy-one".