2221121502453 has 16 divisors (see below), whose sum is σ = 3432236046336. Its totient is φ = 1251336056880.

The previous prime is 2221121502451. The next prime is 2221121502511. The reversal of 2221121502453 is 3542051211222.

It is not a de Polignac number, because 2221121502453 - 2¹ = 2221121502451 is a prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 2221121502453.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2221121502451) 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 15 ways as a sum of consecutive naturals, for example, 744841401 + ... + 744844382.

It is an arithmetic number, because the mean of its divisors is an integer number (214514752896).

Almost surely, 2^{2221121502453} is an apocalyptic number.

It is an amenable number.

2221121502453 is a deficient number, since it is larger than the sum of its proper divisors (1211114543883).

2221121502453 is a wasteful number, since it uses less digits than its factorization.

2221121502453 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1489685864.

The product of its (nonzero) digits is 9600, while the sum is 30.

Adding to 2221121502453 its reverse (3542051211222), we get a palindrome (5763172713675).

The spelling of 2221121502453 in words is "two trillion, two hundred twenty-one billion, one hundred twenty-one million, five hundred two thousand, four hundred fifty-three".