2121352452563 has 4 divisors (see below), whose sum is σ = 2122184684400. Its totient is φ = 2120520220728.

The previous prime is 2121352452533. The next prime is 2121352452677. The reversal of 2121352452563 is 3652542531212.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2121352452563 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 2121352452563.

It is not an unprimeable number, because it can be changed into a prime (2121352452533) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 416112095 + ... + 416117192.

It is an arithmetic number, because the mean of its divisors is an integer number (530546171100).

Almost surely, 2^{2121352452563} is an apocalyptic number.

2121352452563 is a deficient number, since it is larger than the sum of its proper divisors (832231837).

2121352452563 is an equidigital number, since it uses as much as digits as its factorization.

2121352452563 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 832231836.

The product of its digits is 432000, while the sum is 41.

Adding to 2121352452563 its reverse (3652542531212), we get a palindrome (5773894983775).

The spelling of 2121352452563 in words is "two trillion, one hundred twenty-one billion, three hundred fifty-two million, four hundred fifty-two thousand, five hundred sixty-three".