21101211202 has 8 divisors (see below), whose sum is σ = 31685242896. Its totient is φ = 10539463572.

The previous prime is 21101211193. The next prime is 21101211221. The reversal of 21101211202 is 20211210112.

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

It is a super-2 number, since 2×21101211202² (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 (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5568648 + ... + 5572435.

It is an arithmetic number, because the mean of its divisors is an integer number (3960655362).

Almost surely, 2^21101211202 is an apocalyptic number.

21101211202 is a deficient number, since it is larger than the sum of its proper divisors (10584031694).

21101211202 is a wasteful number, since it uses less digits than its factorization.

21101211202 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11142032.

The product of its (nonzero) digits is 16, while the sum is 13.

Adding to 21101211202 its reverse (20211210112), we get a palindrome (41312421314).

The spelling of 21101211202 in words is "twenty-one billion, one hundred one million, two hundred eleven thousand, two hundred two".