212543101161 has 24 divisors (see below), whose sum is σ = 309925497024. Its totient is φ = 140348689440.

The previous prime is 212543101129. The next prime is 212543101181. The reversal of 212543101161 is 161101345212.

212543101161 is a `hidden beast` number, since 2 + 1 + 2 + 543 + 1 + 0 + 116 + 1 = 666.

It is not a de Polignac number, because 212543101161 - 2⁵ = 212543101129 is a prime.

It is a super-2 number, since 2×212543101161² (a number of 23 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (212543101181) 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, 7803076 + ... + 7830266.

It is an arithmetic number, because the mean of its divisors is an integer number (12913562376).

Almost surely, 2^212543101161 is an apocalyptic number.

It is an amenable number.

212543101161 is a deficient number, since it is larger than the sum of its proper divisors (97382395863).

212543101161 is a wasteful number, since it uses less digits than its factorization.

212543101161 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35421 (or 35418 counting only the distinct ones).

The product of its (nonzero) digits is 1440, while the sum is 27.

Adding to 212543101161 its reverse (161101345212), we get a palindrome (373644446373).

The spelling of 212543101161 in words is "two hundred twelve billion, five hundred forty-three million, one hundred one thousand, one hundred sixty-one".