21220121220103 has 8 divisors (see below), whose sum is σ = 22856228740800. Its totient is φ = 19584555199968.

The previous prime is 21220121220083. The next prime is 21220121220107. The reversal of 21220121220103 is 30102212102212.

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 21220121220103 - 2¹³ = 21220121211911 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21220121220107) 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, 135293743 + ... + 135450496.

It is an arithmetic number, because the mean of its divisors is an integer number (2857028592600).

Almost surely, 2^{21220121220103} is an apocalyptic number.

21220121220103 is a deficient number, since it is larger than the sum of its proper divisors (1636107520697).

21220121220103 is a wasteful number, since it uses less digits than its factorization.

21220121220103 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 270750281.

The product of its (nonzero) digits is 192, while the sum is 19.

Adding to 21220121220103 its reverse (30102212102212), we get a palindrome (51322333322315).

The spelling of 21220121220103 in words is "twenty-one trillion, two hundred twenty billion, one hundred twenty-one million, two hundred twenty thousand, one hundred three".