21112021111203 has 48 divisors (see below), whose sum is σ = 33463151864064. Its totient is φ = 12719900767680.

The previous prime is 21112021111199. The next prime is 21112021111213. The reversal of 21112021111203 is 30211112021112.

It is a happy number.

21112021111203 is a `hidden beast` number, since 211 + 120 + 21 + 111 + 203 = 666.

It is not a de Polignac number, because 21112021111203 - 2² = 21112021111199 is a prime.

It is not an unprimeable number, because it can be changed into a prime (21112021111213) 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, 182567400 + ... + 182683002.

It is an arithmetic number, because the mean of its divisors is an integer number (697148997168).

Almost surely, 2^{21112021111203} is an apocalyptic number.

21112021111203 is a deficient number, since it is larger than the sum of its proper divisors (12351130752861).

21112021111203 is a wasteful number, since it uses less digits than its factorization.

21112021111203 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 126456 (or 126453 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 18.

Adding to 21112021111203 its reverse (30211112021112), we get a palindrome (51323133132315).

Subtracting 21112021111203 from its reverse (30211112021112), we obtain a palindrome (9099090909909).

The spelling of 21112021111203 in words is "twenty-one trillion, one hundred twelve billion, twenty-one million, one hundred eleven thousand, two hundred three".