2121345314549 has 8 divisors (see below), whose sum is σ = 2123410997760. Its totient is φ = 2119279843296.

The previous prime is 2121345314521. The next prime is 2121345314593. The reversal of 2121345314549 is 9454135431212.

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 a de Polignac number, because none of the positive numbers 2^k-2121345314549 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2121345314749) 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, 26242217 + ... + 26322929.

It is an arithmetic number, because the mean of its divisors is an integer number (265426374720).

Almost surely, 2^{2121345314549} is an apocalyptic number.

It is an amenable number.

2121345314549 is a deficient number, since it is larger than the sum of its proper divisors (2065683211).

2121345314549 is a wasteful number, since it uses less digits than its factorization.

2121345314549 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 105979.

The product of its digits is 518400, while the sum is 44.

The spelling of 2121345314549 in words is "two trillion, one hundred twenty-one billion, three hundred forty-five million, three hundred fourteen thousand, five hundred forty-nine".