21142221330 has 32 divisors (see below), whose sum is σ = 50766004800. Its totient is φ = 5635184192.

The previous prime is 21142221323. The next prime is 21142221341. The reversal of 21142221330 is 3312224112.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 21142221297 and 21142221306.

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, 108240 + ... + 232379.

It is an arithmetic number, because the mean of its divisors is an integer number (1586437650).

Almost surely, 2^21142221330 is an apocalyptic number.

21142221330 is an abundant number, since it is smaller than the sum of its proper divisors (29623783470).

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

21142221330 is a wasteful number, since it uses less digits than its factorization.

21142221330 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 342698.

The product of its (nonzero) digits is 576, while the sum is 21.

Adding to 21142221330 its reverse (3312224112), we get a palindrome (24454445442).

The spelling of 21142221330 in words is "twenty-one billion, one hundred forty-two million, two hundred twenty-one thousand, three hundred thirty".