21011302120203 has 12 divisors (see below), whose sum is σ = 30362215396968. Its totient is φ = 14001739310400.

The previous prime is 21011302120169. The next prime is 21011302120223. The reversal of 21011302120203 is 30202120311012.

21011302120203 is a `hidden beast` number, since 210 + 1 + 130 + 2 + 120 + 203 = 666.

It is not a de Polignac number, because 21011302120203 - 2¹⁴ = 21011302103819 is a prime.

It is a super-2 number, since 2×21011302120203² (a number of 27 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (21011302120223) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 482930073 + ... + 482973578.

It is an arithmetic number, because the mean of its divisors is an integer number (2530184616414).

Almost surely, 2^{21011302120203} is an apocalyptic number.

21011302120203 is a deficient number, since it is larger than the sum of its proper divisors (9350913276765).

21011302120203 is a wasteful number, since it uses less digits than its factorization.

21011302120203 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 965906074 (or 965906071 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 18.

Adding to 21011302120203 its reverse (30202120311012), we get a palindrome (51213422431215).

The spelling of 21011302120203 in words is "twenty-one trillion, eleven billion, three hundred two million, one hundred twenty thousand, two hundred three".