21102222002 has 8 divisors (see below), whose sum is σ = 32008988700. Its totient is φ = 10432559104.

The previous prime is 21102221993. The next prime is 21102222017. The reversal of 21102222002 is 20022220112.

It can be written as a sum of positive squares in 2 ways, for example, as 19869439681 + 1232782321 = 140959^2 + 35111^2 .

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

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 59275727 + ... + 59276082.

Almost surely, 2^21102222002 is an apocalyptic number.

21102222002 is a deficient number, since it is larger than the sum of its proper divisors (10906766698).

21102222002 is a wasteful number, since it uses less digits than its factorization.

21102222002 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 118551900.

The product of its (nonzero) digits is 64, while the sum is 14.

Adding to 21102222002 its reverse (20022220112), we get a palindrome (41124442114).

The spelling of 21102222002 in words is "twenty-one billion, one hundred two million, two hundred twenty-two thousand, two".