21221230202 has 8 divisors (see below), whose sum is σ = 31832611200. Its totient is φ = 10610359804.

The previous prime is 21221230189. The next prime is 21221230243. The reversal of 21221230202 is 20203212212.

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

It is a super-2 number, since 2×21221230202² (a number of 21 digits) contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2999 + ... + 206037.

It is an arithmetic number, because the mean of its divisors is an integer number (3979076400).

Almost surely, 2^21221230202 is an apocalyptic number.

21221230202 is a deficient number, since it is larger than the sum of its proper divisors (10611380998).

21221230202 is a wasteful number, since it uses less digits than its factorization.

21221230202 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 255300.

The product of its (nonzero) digits is 192, while the sum is 17.

Adding to 21221230202 its reverse (20203212212), we get a palindrome (41424442414).

The spelling of 21221230202 in words is "twenty-one billion, two hundred twenty-one million, two hundred thirty thousand, two hundred two".