21220220202101 has 8 divisors (see below), whose sum is σ = 21463882548000. Its totient is φ = 20977907786640.

The previous prime is 21220220202073. The next prime is 21220220202109. The reversal of 21220220202101 is 10120202202212.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 21220220202101 - 2¹⁰ = 21220220201077 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 21220220202101.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21220220202109) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 337450991 + ... + 337513868.

It is an arithmetic number, because the mean of its divisors is an integer number (2682985318500).

Almost surely, 2^{21220220202101} is an apocalyptic number.

It is an amenable number.

21220220202101 is a deficient number, since it is larger than the sum of its proper divisors (243662345899).

21220220202101 is a wasteful number, since it uses less digits than its factorization.

21220220202101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 674965219.

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

Adding to 21220220202101 its reverse (10120202202212), we get a palindrome (31340422404313).

The spelling of 21220220202101 in words is "twenty-one trillion, two hundred twenty billion, two hundred twenty million, two hundred two thousand, one hundred one".