21141220103 has 4 divisors (see below), whose sum is σ = 21154215720. Its totient is φ = 21128224488.

The previous prime is 21141220091. The next prime is 21141220123. The reversal of 21141220103 is 30102214112.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 21141220103 - 2⁶ = 21141220039 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 (21141220123) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6495368 + ... + 6498621.

It is an arithmetic number, because the mean of its divisors is an integer number (5288553930).

Almost surely, 2^21141220103 is an apocalyptic number.

21141220103 is a deficient number, since it is larger than the sum of its proper divisors (12995617).

21141220103 is a wasteful number, since it uses less digits than its factorization.

21141220103 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12995616.

The product of its (nonzero) digits is 96, while the sum is 17.

Adding to 21141220103 its reverse (30102214112), we get a palindrome (51243434215).

The spelling of 21141220103 in words is "twenty-one billion, one hundred forty-one million, two hundred twenty thousand, one hundred three".