21000202242 has 8 divisors (see below), whose sum is σ = 42000404496. Its totient is φ = 7000067412.

The previous prime is 21000202241. The next prime is 21000202247. The reversal of 21000202242 is 24220200012.

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

21000202242 is an admirable number.

It is not an unprimeable number, because it can be changed into a prime (21000202241) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1750016848 + ... + 1750016859.

It is an arithmetic number, because the mean of its divisors is an integer number (5250050562).

Almost surely, 2^21000202242 is an apocalyptic number.

21000202242 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

21000202242 is a wasteful number, since it uses less digits than its factorization.

21000202242 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3500033712.

The product of its (nonzero) digits is 128, while the sum is 15.

Adding to 21000202242 its reverse (24220200012), we get a palindrome (45220402254).

The spelling of 21000202242 in words is "twenty-one billion, two hundred two thousand, two hundred forty-two".