21120102210202 has 8 divisors (see below), whose sum is σ = 31742393303700. Its totient is φ = 10539304442304.

The previous prime is 21120102210187. The next prime is 21120102210203. The reversal of 21120102210202 is 20201220102112.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 21035257589241 + 84844620961 = 4586421^2 + 291281^2 .

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

It is not an unprimeable number, because it can be changed into a prime (21120102210203) 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, 10373330127 + ... + 10373332162.

Almost surely, 2^{21120102210202} is an apocalyptic number.

21120102210202 is a deficient number, since it is larger than the sum of its proper divisors (10622291093498).

21120102210202 is a wasteful number, since it uses less digits than its factorization.

21120102210202 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20746662800.

The product of its (nonzero) digits is 64, while the sum is 16.

Adding to 21120102210202 its reverse (20201220102112), we get a palindrome (41321322312314).

The spelling of 21120102210202 in words is "twenty-one trillion, one hundred twenty billion, one hundred two million, two hundred ten thousand, two hundred two".