211201423056 has 100 divisors (see below), whose sum is σ = 658299644772. Its totient is φ = 64985048064.

The previous prime is 211201423031. The next prime is 211201423079. The reversal of 211201423056 is 650324102112.

211201423056 is a `hidden beast` number, since 211 + 2 + 0 + 142 + 305 + 6 = 666.

211201423056 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 57054099600 + 154147323456 = 238860^2 + 392616^2 .

It is a super-2 number, since 2×211201423056² (a number of 23 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is an unprimeable number.

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 19 ways as a sum of consecutive naturals, for example, 6251001 + ... + 6284696.

Almost surely, 2^211201423056 is an apocalyptic number.

211201423056 is a gapful number since it is divisible by the number (26) formed by its first and last digit.

It is an amenable number.

211201423056 is an abundant number, since it is smaller than the sum of its proper divisors (447098221716).

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

211201423056 is a wasteful number, since it uses less digits than its factorization.

211201423056 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12535730 (or 12535715 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 27.

Adding to 211201423056 its reverse (650324102112), we get a palindrome (861525525168).

The spelling of 211201423056 in words is "two hundred eleven billion, two hundred one million, four hundred twenty-three thousand, fifty-six".