21220021220102 has 8 divisors (see below), whose sum is σ = 31830335776512. Its totient is φ = 10609909294600.

The previous prime is 21220021220029. The next prime is 21220021220113. The reversal of 21220021220102 is 20102212002212.

It is a happy number.

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

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 50395649 + ... + 50814972.

It is an arithmetic number, because the mean of its divisors is an integer number (3978791972064).

Almost surely, 2^{21220021220102} is an apocalyptic number.

21220021220102 is a deficient number, since it is larger than the sum of its proper divisors (10610314556410).

21220021220102 is a wasteful number, since it uses less digits than its factorization.

21220021220102 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 101315454.

The product of its (nonzero) digits is 128, while the sum is 17.

Adding to 21220021220102 its reverse (20102212002212), we get a palindrome (41322233222314).

The spelling of 21220021220102 in words is "twenty-one trillion, two hundred twenty billion, twenty-one million, two hundred twenty thousand, one hundred two".