211548770081 has 16 divisors (see below), whose sum is σ = 232036360128. Its totient is φ = 191271014400.

The previous prime is 211548770071. The next prime is 211548770087. The reversal of 211548770081 is 180077845112.

It is a cyclic number.

It is not a de Polignac number, because 211548770081 - 2¹⁴ = 211548753697 is a prime.

It is a super-2 number, since 2×211548770081² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (211548770087) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 10012130 + ... + 10033236.

It is an arithmetic number, because the mean of its divisors is an integer number (14502272508).

Almost surely, 2^211548770081 is an apocalyptic number.

It is an amenable number.

211548770081 is a deficient number, since it is larger than the sum of its proper divisors (20487590047).

211548770081 is a wasteful number, since it uses less digits than its factorization.

211548770081 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26032.

The product of its (nonzero) digits is 125440, while the sum is 44.

The spelling of 211548770081 in words is "two hundred eleven billion, five hundred forty-eight million, seven hundred seventy thousand, eighty-one".