211030380561 has 128 divisors (see below), whose sum is σ = 390664028160. Its totient is φ = 97756243200.

The previous prime is 211030380541. The next prime is 211030380569. The reversal of 211030380561 is 165083030112.

It is not a de Polignac number, because 211030380561 - 2⁷ = 211030380433 is a prime.

It is not an unprimeable number, because it can be changed into a prime (211030380569) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 63580860 + ... + 63584178.

It is an arithmetic number, because the mean of its divisors is an integer number (3052062720).

Almost surely, 2^211030380561 is an apocalyptic number.

211030380561 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

211030380561 is a deficient number, since it is larger than the sum of its proper divisors (179633647599).

211030380561 is a wasteful number, since it uses less digits than its factorization.

211030380561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4067.

The product of its (nonzero) digits is 4320, while the sum is 30.

The spelling of 211030380561 in words is "two hundred eleven billion, thirty million, three hundred eighty thousand, five hundred sixty-one".