22145343345321 has 32 divisors (see below), whose sum is σ = 34913644604160. Its totient is φ = 12216465321984.

The previous prime is 22145343345313. The next prime is 22145343345341. The reversal of 22145343345321 is 12354334354122.

It is not a de Polignac number, because 22145343345321 - 2³ = 22145343345313 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (22145343345311) 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 31 ways as a sum of consecutive naturals, for example, 2043021 + ... + 6961653.

It is an arithmetic number, because the mean of its divisors is an integer number (1091051393880).

Almost surely, 2^{22145343345321} is an apocalyptic number.

22145343345321 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

22145343345321 is a deficient number, since it is larger than the sum of its proper divisors (12768301258839).

22145343345321 is a wasteful number, since it uses less digits than its factorization.

22145343345321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4926065.

The product of its digits is 1036800, while the sum is 42.

Adding to 22145343345321 its reverse (12354334354122), we get a palindrome (34499677699443).

The spelling of 22145343345321 in words is "twenty-two trillion, one hundred forty-five billion, three hundred forty-three million, three hundred forty-five thousand, three hundred twenty-one".