21201342112 has 24 divisors (see below), whose sum is σ = 42311929716. Its totient is φ = 10455455232.

The previous prime is 21201342077. The next prime is 21201342121. The reversal of 21201342112 is 21124310212.

It can be written as a sum of positive squares in 2 ways, for example, as 20748673936 + 452668176 = 144044^2 + 21276^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 21201342112.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 4535623 + ... + 4540294.

Almost surely, 2^21201342112 is an apocalyptic number.

It is an amenable number.

21201342112 is a deficient number, since it is larger than the sum of its proper divisors (21110587604).

21201342112 is an equidigital number, since it uses as much as digits as its factorization.

21201342112 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9076000 (or 9075992 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 19.

Adding to 21201342112 its reverse (21124310212), we get a palindrome (42325652324).

The spelling of 21201342112 in words is "twenty-one billion, two hundred one million, three hundred forty-two thousand, one hundred twelve".