2121352044505 has 8 divisors (see below), whose sum is σ = 2546297886600. Its totient is φ = 1696631346816.

The previous prime is 2121352044397. The next prime is 2121352044509. The reversal of 2121352044505 is 5054402531212.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 476833061961 + 1644518982544 = 690531^2 + 1282388^2 .

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 2121352044505 - 2²³ = 2121343655897 is a prime.

It is not an unprimeable number, because it can be changed into a prime (2121352044509) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 56265370 + ... + 56303059.

It is an arithmetic number, because the mean of its divisors is an integer number (318287235825).

Almost surely, 2^{2121352044505} is an apocalyptic number.

It is an amenable number.

2121352044505 is a deficient number, since it is larger than the sum of its proper divisors (424945842095).

2121352044505 is a wasteful number, since it uses less digits than its factorization.

2121352044505 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 112572203.

The product of its (nonzero) digits is 48000, while the sum is 34.

Adding to 2121352044505 its reverse (5054402531212), we get a palindrome (7175754575717).

The spelling of 2121352044505 in words is "two trillion, one hundred twenty-one billion, three hundred fifty-two million, forty-four thousand, five hundred five".