21144130103 has 32 divisors (see below), whose sum is σ = 23607562752. Its totient is φ = 18845798400.

The previous prime is 21144130087. The next prime is 21144130129. The reversal of 21144130103 is 30103144112.

It is a cyclic number.

It is not a de Polignac number, because 21144130103 - 2⁴ = 21144130087 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 (21144130153) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 14551325 + ... + 14552777.

It is an arithmetic number, because the mean of its divisors is an integer number (737736336).

Almost surely, 2^21144130103 is an apocalyptic number.

21144130103 is a deficient number, since it is larger than the sum of its proper divisors (2463432649).

21144130103 is a wasteful number, since it uses less digits than its factorization.

21144130103 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2075.

The product of its (nonzero) digits is 288, while the sum is 20.

Adding to 21144130103 its reverse (30103144112), we get a palindrome (51247274215).

The spelling of 21144130103 in words is "twenty-one billion, one hundred forty-four million, one hundred thirty thousand, one hundred three".