21142220882 has 8 divisors (see below), whose sum is σ = 31724800896. Its totient is φ = 10567287252.

The previous prime is 21142220821. The next prime is 21142220903. The reversal of 21142220882 is 28802224112.

It is a sphenic number, since it is the product of 3 distinct primes.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1904678 + ... + 1915745.

It is an arithmetic number, because the mean of its divisors is an integer number (3965600112).

Almost surely, 2^21142220882 is an apocalyptic number.

21142220882 is a deficient number, since it is larger than the sum of its proper divisors (10582580014).

21142220882 is a wasteful number, since it uses less digits than its factorization.

21142220882 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3823192.

The product of its (nonzero) digits is 8192, while the sum is 32.

Adding to 21142220882 its reverse (28802224112), we get a palindrome (49944444994).

The spelling of 21142220882 in words is "twenty-one billion, one hundred forty-two million, two hundred twenty thousand, eight hundred eighty-two".