21220221211102 has 8 divisors (see below), whose sum is σ = 31831152239016. Its totient is φ = 10609837131432.

The previous prime is 21220221211097. The next prime is 21220221211117. The reversal of 21220221211102 is 20111212202212.

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

It is a self number, because there is not a number n which added to its sum of digits gives 21220221211102.

It is a congruent number.

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, 136640053 + ... + 136795264.

It is an arithmetic number, because the mean of its divisors is an integer number (3978894029877).

Almost surely, 2^{21220221211102} is an apocalyptic number.

21220221211102 is a deficient number, since it is larger than the sum of its proper divisors (10610931027914).

21220221211102 is a wasteful number, since it uses less digits than its factorization.

21220221211102 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 273474122.

The product of its (nonzero) digits is 128, while the sum is 19.

Adding to 21220221211102 its reverse (20111212202212), we get a palindrome (41331433413314).

The spelling of 21220221211102 in words is "twenty-one trillion, two hundred twenty billion, two hundred twenty-one million, two hundred eleven thousand, one hundred two".