21100120111203 has 48 divisors (see below), whose sum is σ = 34431009054624. Its totient is φ = 11445210524160.

The previous prime is 21100120111171. The next prime is 21100120111223. The reversal of 21100120111203 is 30211102100112.

It is not a de Polignac number, because 21100120111203 - 2⁵ = 21100120111171 is a prime.

It is a super-2 number, since 2×21100120111203² (a number of 27 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (21100120111223) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 47086900 + ... + 47532897.

It is an arithmetic number, because the mean of its divisors is an integer number (717312688638).

Almost surely, 2^{21100120111203} is an apocalyptic number.

21100120111203 is a deficient number, since it is larger than the sum of its proper divisors (13330888943421).

21100120111203 is a wasteful number, since it uses less digits than its factorization.

21100120111203 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 94619892 (or 94619885 counting only the distinct ones).

The product of its (nonzero) digits is 24, while the sum is 15.

Adding to 21100120111203 its reverse (30211102100112), we get a palindrome (51311222211315).

The spelling of 21100120111203 in words is "twenty-one trillion, one hundred billion, one hundred twenty million, one hundred eleven thousand, two hundred three".