21220130123203 has 16 divisors (see below), whose sum is σ = 23297407417440. Its totient is φ = 19167556262400.

The previous prime is 21220130123141. The next prime is 21220130123233. The reversal of 21220130123203 is 30232103102212.

It is a cyclic number.

It is not a de Polignac number, because 21220130123203 - 2³³ = 21211540188611 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21220130123233) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 60756153 + ... + 61104421.

It is an arithmetic number, because the mean of its divisors is an integer number (1456087963590).

Almost surely, 2^{21220130123203} is an apocalyptic number.

21220130123203 is a deficient number, since it is larger than the sum of its proper divisors (2077277294237).

21220130123203 is a wasteful number, since it uses less digits than its factorization.

21220130123203 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 383718.

The product of its (nonzero) digits is 864, while the sum is 22.

Adding to 21220130123203 its reverse (30232103102212), we get a palindrome (51452233225415).

The spelling of 21220130123203 in words is "twenty-one trillion, two hundred twenty billion, one hundred thirty million, one hundred twenty-three thousand, two hundred three".