212440342401 has 24 divisors (see below), whose sum is σ = 362007919104. Its totient is φ = 117478529280.

The previous prime is 212440342399. The next prime is 212440342417. The reversal of 212440342401 is 104243044212.

212440342401 is a `hidden beast` number, since 2 + 12 + 4 + 403 + 4 + 240 + 1 = 666.

It is not a de Polignac number, because 212440342401 - 2¹ = 212440342399 is a prime.

It is not an unprimeable number, because it can be changed into a prime (212440342451) 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, 54386256 + ... + 54390161.

It is an arithmetic number, because the mean of its divisors is an integer number (15083663296).

Almost surely, 2^212440342401 is an apocalyptic number.

212440342401 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

212440342401 is a deficient number, since it is larger than the sum of its proper divisors (149567576703).

212440342401 is a wasteful number, since it uses less digits than its factorization.

212440342401 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 108776461 (or 108776458 counting only the distinct ones).

The product of its (nonzero) digits is 6144, while the sum is 27.

Adding to 212440342401 its reverse (104243044212), we get a palindrome (316683386613).

The spelling of 212440342401 in words is "two hundred twelve billion, four hundred forty million, three hundred forty-two thousand, four hundred one".