21110121220202 has 8 divisors (see below), whose sum is σ = 36188779234656. Its totient is φ = 9047194808652.

The previous prime is 21110121220183. The next prime is 21110121220351. The reversal of 21110121220202 is 20202212101112.

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, 753932900708 + ... + 753932900735.

It is an arithmetic number, because the mean of its divisors is an integer number (4523597404332).

Almost surely, 2^{21110121220202} is an apocalyptic number.

21110121220202 is a deficient number, since it is larger than the sum of its proper divisors (15078658014454).

21110121220202 is a wasteful number, since it uses less digits than its factorization.

21110121220202 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1507865801452.

The product of its (nonzero) digits is 64, while the sum is 17.

Adding to 21110121220202 its reverse (20202212101112), we get a palindrome (41312333321314).

The spelling of 21110121220202 in words is "twenty-one trillion, one hundred ten billion, one hundred twenty-one million, two hundred twenty thousand, two hundred two".