2145104234521 has 8 divisors (see below), whose sum is σ = 2214928716800. Its totient is φ = 2075318975520.

The previous prime is 2145104234519. The next prime is 2145104234543. The reversal of 2145104234521 is 1254324015412.

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 2145104234521 - 2¹ = 2145104234519 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2145104234621) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9694641 + ... + 9913438.

It is an arithmetic number, because the mean of its divisors is an integer number (276866089600).

Almost surely, 2^{2145104234521} is an apocalyptic number.

It is an amenable number.

2145104234521 is a deficient number, since it is larger than the sum of its proper divisors (69824482279).

2145104234521 is a wasteful number, since it uses less digits than its factorization.

2145104234521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19611639.

The product of its (nonzero) digits is 38400, while the sum is 34.

Adding to 2145104234521 its reverse (1254324015412), we get a palindrome (3399428249933).

The spelling of 2145104234521 in words is "two trillion, one hundred forty-five billion, one hundred four million, two hundred thirty-four thousand, five hundred twenty-one".