2121344440401 has 8 divisors (see below), whose sum is σ = 2856463801344. Its totient is φ = 1400227353200.

The previous prime is 2121344440331. The next prime is 2121344440433. The reversal of 2121344440401 is 1040444431212.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 2121344440401 - 2¹³ = 2121344432209 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (2121344440301) 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, 3500568081 + ... + 3500568686.

It is an arithmetic number, because the mean of its divisors is an integer number (357057975168).

Almost surely, 2^{2121344440401} is an apocalyptic number.

It is an amenable number.

2121344440401 is a deficient number, since it is larger than the sum of its proper divisors (735119360943).

2121344440401 is a wasteful number, since it uses less digits than its factorization.

2121344440401 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7001136871.

The product of its (nonzero) digits is 12288, while the sum is 30.

Adding to 2121344440401 its reverse (1040444431212), we get a palindrome (3161788871613).

The spelling of 2121344440401 in words is "two trillion, one hundred twenty-one billion, three hundred forty-four million, four hundred forty thousand, four hundred one".