213440122001 has 8 divisors (see below), whose sum is σ = 214107059400. Its totient is φ = 212773893120.

The previous prime is 213440121991. The next prime is 213440122087. The reversal of 213440122001 is 100221044312.

It can be written as a sum of positive squares in 4 ways, for example, as 38675155600 + 174764966401 = 196660^2 + 418049^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-213440122001 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (213440122601) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 429545 + ... + 781913.

It is an arithmetic number, because the mean of its divisors is an integer number (26763382425).

Almost surely, 2^213440122001 is an apocalyptic number.

It is an amenable number.

213440122001 is a deficient number, since it is larger than the sum of its proper divisors (666937399).

213440122001 is a wasteful number, since it uses less digits than its factorization.

213440122001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 354259.

The product of its (nonzero) digits is 384, while the sum is 20.

Adding to 213440122001 its reverse (100221044312), we get a palindrome (313661166313).

The spelling of 213440122001 in words is "two hundred thirteen billion, four hundred forty million, one hundred twenty-two thousand, one".