22421131345 has 16 divisors (see below), whose sum is σ = 27091061712. Its totient is φ = 17813422080.

The previous prime is 22421131319. The next prime is 22421131417. The reversal of 22421131345 is 54313112422.

It can be written as a sum of positive squares in 8 ways, for example, as 115111441 + 22306019904 = 10729^2 + 149352^2 .

It is not a de Polignac number, because 22421131345 - 2¹⁹ = 22420607057 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 552655 + ... + 591835.

It is an arithmetic number, because the mean of its divisors is an integer number (1693191357).

Almost surely, 2^22421131345 is an apocalyptic number.

It is an amenable number.

22421131345 is a deficient number, since it is larger than the sum of its proper divisors (4669930367).

22421131345 is a wasteful number, since it uses less digits than its factorization.

22421131345 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39972.

The product of its digits is 5760, while the sum is 28.

Adding to 22421131345 its reverse (54313112422), we get a palindrome (76734243767).

The spelling of 22421131345 in words is "twenty-two billion, four hundred twenty-one million, one hundred thirty-one thousand, three hundred forty-five".