2145521021322 has 32 divisors (see below), whose sum is σ = 4905829660032. Its totient is φ = 612783304704.

The previous prime is 2145521021321. The next prime is 2145521021333. The reversal of 2145521021322 is 2231201255412.

It is a self number, because there is not a number n which added to its sum of digits gives 2145521021322.

It is not an unprimeable number, because it can be changed into a prime (2145521021321) 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, 9162223 + ... + 9393474.

It is an arithmetic number, because the mean of its divisors is an integer number (153307176876).

Almost surely, 2^{2145521021322} is an apocalyptic number.

2145521021322 is an abundant number, since it is smaller than the sum of its proper divisors (2760308638710).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

2145521021322 is a wasteful number, since it uses less digits than its factorization.

2145521021322 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18558462.

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

Adding to 2145521021322 its reverse (2231201255412), we get a palindrome (4376722276734).

The spelling of 2145521021322 in words is "two trillion, one hundred forty-five billion, five hundred twenty-one million, twenty-one thousand, three hundred twenty-two".