21111203220103 has 8 divisors (see below), whose sum is σ = 21603719181968. Its totient is φ = 20618758065024.

The previous prime is 21111203220067. The next prime is 21111203220137. The reversal of 21111203220103 is 30102230211112.

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 21111203220103 - 2⁹ = 21111203219591 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21111203220203) 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, 17098200 + ... + 18291277.

It is an arithmetic number, because the mean of its divisors is an integer number (2700464897746).

Almost surely, 2^{21111203220103} is an apocalyptic number.

21111203220103 is a deficient number, since it is larger than the sum of its proper divisors (492515961865).

21111203220103 is a wasteful number, since it uses less digits than its factorization.

21111203220103 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35403393.

The product of its (nonzero) digits is 144, while the sum is 19.

Adding to 21111203220103 its reverse (30102230211112), we get a palindrome (51213433431215).

The spelling of 21111203220103 in words is "twenty-one trillion, one hundred eleven billion, two hundred three million, two hundred twenty thousand, one hundred three".