21102212002 has 8 divisors (see below), whose sum is σ = 31653971136. Its totient is φ = 10550888292.

The previous prime is 21102211997. The next prime is 21102212051. The reversal of 21102212002 is 20021220112.

It is a happy number.

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

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, 73203 + ... + 218089.

It is an arithmetic number, because the mean of its divisors is an integer number (3956746392).

Almost surely, 2^21102212002 is an apocalyptic number.

21102212002 is a deficient number, since it is larger than the sum of its proper divisors (10551759134).

21102212002 is a wasteful number, since it uses less digits than its factorization.

21102212002 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 217712.

The product of its (nonzero) digits is 32, while the sum is 13.

Adding to 21102212002 its reverse (20021220112), we get a palindrome (41123432114).

The spelling of 21102212002 in words is "twenty-one billion, one hundred two million, two hundred twelve thousand, two".