21102220202 has 8 divisors (see below), whose sum is σ = 36175234656. Its totient is φ = 9043808652.

The previous prime is 21102220187. The next prime is 21102220231. The reversal of 21102220202 is 20202220112.

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

It is a Harshad number since it is a multiple of its sum of digits (14), and also a Moran number because the ratio is a prime number: 1507301443 = 21102220202 / (2 + 1 + 1 + 0 + 2 + 2 + 2 + 0 + 2 + 0 + 2).

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, 753650708 + ... + 753650735.

It is an arithmetic number, because the mean of its divisors is an integer number (4521904332).

Almost surely, 2^21102220202 is an apocalyptic number.

21102220202 is a deficient number, since it is larger than the sum of its proper divisors (15073014454).

21102220202 is a wasteful number, since it uses less digits than its factorization.

21102220202 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1507301452.

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

Adding to 21102220202 its reverse (20202220112), we get a palindrome (41304440314).

The spelling of 21102220202 in words is "twenty-one billion, one hundred two million, two hundred twenty thousand, two hundred two".